+ * Revision 1.175 2008/05/09 18:53:59 fabiankeil
+ * Fix comment grammar.
+ *
+ * Revision 1.174 2008/05/07 18:05:53 fabiankeil
+ * Remove the pointless buffer in client_protocol_is_unsupported().
+ *
+ * Revision 1.173 2008/05/06 15:09:00 fabiankeil
+ * Least-effort fix for bug #1821930 (reported by Lee):
+ * If the response doesn't look like HTTP,
+ * tell the client and log the problem.
+ *
+ * Revision 1.172 2008/04/16 16:38:21 fabiankeil
+ * Don't pass the whole csp structure to flush_socket()
+ * when it only needs a file descriptor and a buffer.
+ *
+ * Revision 1.171 2008/03/27 18:27:25 fabiankeil
+ * Remove kill-popups action.
+ *
+ * Revision 1.170 2008/03/06 16:33:46 fabiankeil
+ * If limit-connect isn't used, don't limit CONNECT requests to port 443.
+ *
+ * Revision 1.169 2008/03/04 18:30:39 fabiankeil
+ * Remove the treat-forbidden-connects-like-blocks action. We now
+ * use the "blocked" page for forbidden CONNECT requests by default.
+ *
+ * Revision 1.168 2008/03/02 12:25:25 fabiankeil
+ * Also use shiny new connect_port_is_forbidden() in jcc.c.
+ *
+ * Revision 1.167 2008/02/23 16:57:12 fabiankeil
+ * Rename url_actions() to get_url_actions() and let it
+ * use the standard parameter ordering.
+ *
+ * Revision 1.166 2008/02/23 16:33:43 fabiankeil
+ * Let forward_url() use the standard parameter ordering
+ * and mark its second parameter immutable.
+ *
+ * Revision 1.165 2008/02/02 19:36:56 fabiankeil
+ * Remove the "Listening ... for local connections only" log message.
+ * Whether or not remote connections are able to reach Privoxy is up
+ * to the operating system.
+ *
+ * Revision 1.164 2007/12/16 18:32:46 fabiankeil
+ * Prevent the log messages for CONNECT requests to unacceptable
+ * ports from printing the limit-connect argument as [null] if
+ * limit-connect hasn't been explicitly enabled.
+ *
+ * Revision 1.163 2007/12/13 01:47:11 david__schmidt
+ * Make sure all console-mode apps get a usage() instance
+ *
+ * Revision 1.162 2007/12/06 17:54:57 fabiankeil
+ * Reword NO_SERVER_DATA_RESPONSE to make it harder
+ * to misunderstand what the message is all about.
+ *
+ * Revision 1.161 2007/12/04 19:44:22 fabiankeil
+ * Unbreak trustfile which previously didn't work without
+ * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
+ *
+ * Revision 1.160 2007/11/29 18:00:29 fabiankeil
+ * Plug memory leak. Spotted by Valgrind, triggered by
+ * Privoxy-Regression-Test feeding proxyfuzz.py.
+ *
+ * Revision 1.159 2007/11/24 14:34:09 fabiankeil
+ * In the HTTP snipplets, refer to the client as client.
+ *
+ * Revision 1.158 2007/11/11 16:44:17 fabiankeil
+ * Emit a log message when activating the MS IIS5 hack.
+ *
+ * Revision 1.157 2007/11/03 17:34:49 fabiankeil
+ * Log the "weak randomization factor" warning only
+ * once for mingw32 and provide some more details.
+ *
+ * Revision 1.156 2007/11/01 18:20:58 fabiankeil
+ * Initialize log module after initializing mutexes, future
+ * deadlocks in that code should now work cross-platform.
+ *
+ * Revision 1.155 2007/10/23 20:12:45 fabiankeil
+ * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
+ * Reported by Bert van Leeuwen in BR#1818808.
+ *
+ * Revision 1.154 2007/10/19 17:00:08 fabiankeil
+ * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
+ *
+ * Revision 1.153 2007/10/14 14:12:41 fabiankeil
+ * When in daemon mode, close stderr after the configuration file has been
+ * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
+ *
+ * Revision 1.152 2007/10/04 18:03:34 fabiankeil
+ * - Fix a crash when parsing invalid requests whose first header
+ * is rejected by get_header(). Regression (re?)introduced
+ * in r1.143 by yours truly.
+ * - Move ACTION_VANILLA_WAFER handling into parsers.c's
+ * client_cookie_adder() to make sure send-vanilla-wafer can be
+ * controlled through tags (and thus regression-tested).
+ *
+ * Revision 1.151 2007/09/29 10:21:16 fabiankeil
+ * - Move get_filter_function() from jcc.c to filters.c
+ * so the filter functions can be static.
+ * - Don't bother filtering body-less responses.
+ *
+ * Revision 1.150 2007/09/28 16:39:29 fabiankeil
+ * Execute content filters through execute_content_filter().
+ *
+ * Revision 1.149 2007/09/04 15:08:48 fabiankeil
+ * Initialize req to NULL to make sure it's defined if the
+ * first read_socket() call fails. Reported by icmp30.
+ *
+ * Revision 1.148 2007/08/26 16:47:13 fabiankeil
+ * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
+ * extensive comments moved to user manual.
+ *
+ * Revision 1.147 2007/08/25 14:42:40 fabiankeil
+ * Don't crash if a broken header filter wiped out the request line.
+ *
+ * Revision 1.146 2007/08/20 17:09:32 fabiankeil
+ * Fix byte_count calculation in case of flushes
+ * and don't parse the server headers a second time.
+ *
+ * Revision 1.145 2007/08/19 13:13:31 fabiankeil
+ * - If there's a connection problem after we already forwarded
+ * parts of the original content, just hang up. Fixes BR#1776724.
+ * - Fix warnings about unused code on mingw32.
+ * - In case of flushes, calculate the byte count
+ * less incorrectly (I think).
+ *
+ * Revision 1.144 2007/08/11 14:43:22 fabiankeil
+ * Add some more prototypes for static functions.
+ *
+ * Revision 1.143 2007/08/05 13:58:19 fabiankeil
+ * Comment out request_contains_null_bytes() until it's used again.
+ *
+ * Revision 1.142 2007/08/05 13:50:26 fabiankeil
+ * #1763173 from Stefan Huehner: s@const static@static const@
+ * and declare some more functions static.
+ *
+ * Revision 1.141 2007/08/04 09:56:23 fabiankeil
+ * - Log rejected CONNECT requests with LOG_LEVEL_INFO
+ * and explain why they were rejected in the first place.
+ * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
+ * CONNECT requests. The request line was missing.
+ * - Add two more XXX reminders as we don't have enough already.
+ *
+ * Revision 1.140 2007/07/21 11:51:36 fabiankeil
+ * As Hal noticed, checking dispatch_cgi() as the last cruncher
+ * looks like a bug if CGI requests are blocked unintentionally,
+ * so don't do it unless the user enabled the new config option
+ * "allow-cgi-request-crunching".
+ *
+ * Revision 1.139 2007/07/14 07:46:41 fabiankeil
+ * - Allow to rewrite the request destination behind the client's back.
+ * - Turn the weird-looking unconditional for loop that
+ * reads the client request into a conditional while loop.
+ * Move the stuff that only runs once out of the loop.
+ * - Move parts of chat(), server_content_type() and the
+ * necessary stuff to fix BR#1750917 into get_filter_function().
+ *
+ * Revision 1.138 2007/06/03 18:45:18 fabiankeil
+ * Temporary workaround for BR#1730105.
+ *
+ * Revision 1.137 2007/06/01 18:16:36 fabiankeil
+ * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
+ * deadlocks and crashes on OpenBSD and possibly other OS with neither
+ * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
+ * Thanks to Ralf Horstmann for report and solution.
+ *
+ * Revision 1.136 2007/06/01 16:41:11 fabiankeil
+ * Add forward-override{} to change the forwarding settings through
+ * action sections. This is mainly interesting to forward different
+ * clients differently (for example based on User-Agent or request
+ * origin).
+ *
+ * Revision 1.135 2007/05/24 17:03:50 fabiankeil
+ * - Let usage() mention the --chroot parameter.
+ * - Use read_socket() consistently and always leave
+ * the last buffer byte alone, even in cases where
+ * null termination (currently) doesn't matter.
+ *
+ * Revision 1.134 2007/05/16 14:59:46 fabiankeil
+ * - Fix config file loading on Unix if no config file is specified.
+ * Since r1.97 Privoxy would always interpret the last argument as
+ * config file, even if it's a valid command line option.
+ * - Abort in case of unrecognized command line options. Closes #1719696.
+ * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
+ * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
+ *
+ * Revision 1.133 2007/05/04 11:23:19 fabiankeil
+ * - Don't rerun crunchers that only depend on the request URL.
+ * - Don't count redirects and CGI requests as "blocked requests".
+ *
+ * Revision 1.132 2007/04/25 15:15:17 fabiankeil
+ * Support crunching based on tags created by server-header taggers.
+ *
+ * Revision 1.131 2007/04/22 13:24:50 fabiankeil
+ * Make HTTP snippets static (again). Add a Content-Type for those
+ * with content so the browser doesn't guess it based on the URL.
+ *
+ * Revision 1.130 2007/04/19 13:47:34 fabiankeil
+ * Move crunching and request line rebuilding out of chat().
+ *
+ * Revision 1.129 2007/04/15 16:39:20 fabiankeil
+ * Introduce tags as alternative way to specify which
+ * actions apply to a request. At the moment tags can be
+ * created based on client and server headers.
+ *
+ * Revision 1.128 2007/03/25 16:55:54 fabiankeil
+ * Don't CLF-log CONNECT requests twice.
+ *
+ * Revision 1.127 2007/03/20 13:53:17 fabiankeil
+ * Log the source address for ACL-related connection drops.
+ *
+ * Revision 1.126 2007/03/17 15:20:05 fabiankeil
+ * New config option: enforce-blocks.
+ *
+ * Revision 1.125 2007/03/09 14:12:00 fabiankeil
+ * - Move null byte check into separate function.
+ * - Don't confuse the client with error pages
+ * if a CONNECT request was already confirmed.
+ *
+ * Revision 1.124 2007/02/23 14:59:54 fabiankeil
+ * Speed up NULL byte escaping and only log the complete
+ * NULL byte requests with header debugging enabled.
+ *
+ * Revision 1.123 2007/02/21 18:42:10 fabiankeil
+ * Answer requests that contain NULL bytes with
+ * a custom response instead of waiting for more
+ * data until the client eventually hangs up.
+ *
+ * Revision 1.122 2007/02/07 11:12:02 fabiankeil
+ * - Move delivery and logging of crunched responses
+ * from chat() into send_crunch_response().
+ * - Display the reason for generating http_responses.
+ * - Log the content length for LOG_LEVEL_CLF correctly
+ * (still incorrect for some fixed responses).
+ * - Reword an incorrect comment about
+ * treat-forbidden-connects-like-blocks violating
+ * the specs.
+ * - Add some log messages.
+ *
+ * Revision 1.121 2007/01/27 10:52:56 fabiankeil
+ * Move mutex initialization into separate
+ * function and exit in case of errors.
+ *
+ * Revision 1.120 2007/01/26 14:18:42 fabiankeil
+ * - Start to reduce chat()'s line count and move
+ * parts of it into separate functions.
+ * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
+ *
+ * Revision 1.119 2007/01/25 14:02:30 fabiankeil
+ * - Add Proxy-Agent header to HTTP snippets that are
+ * supposed to reach HTTP clients only.
+ * - Made a few CONNECT log messages more descriptive.
+ * - Catch completely empty server responses (as seen
+ * with Tor's fake ".noconnect" top level domain).
+ * - Use shiny new "forwarding-failed" template for socks errors.
+ *
+ * Revision 1.118 2007/01/07 07:43:43 joergs
+ * AmigaOS4 support added.
+ *
+ * Revision 1.117 2006/12/31 17:56:37 fabiankeil
+ * Added config option accept-intercepted-requests
+ * and disabled it by default.
+ *
+ * Revision 1.116 2006/12/29 19:08:22 fabiankeil
+ * Reverted parts of my last commit
+ * to keep error handling working.
+ *
+ * Revision 1.115 2006/12/29 17:38:57 fabiankeil
+ * Fixed gcc43 conversion warnings.
+ *
+ * Revision 1.114 2006/12/27 18:52:02 fabiankeil
+ * Fix -pedantic ISO C warning about converting
+ * from function pointer to object pointer.
+ *
+ * Revision 1.113 2006/12/26 17:38:50 fabiankeil
+ * Silence compiler warning I introduced with my last commit.
+ *
+ * Revision 1.112 2006/12/26 17:31:41 fabiankeil
+ * Mutex protect rand() if POSIX threading
+ * is used, warn the user if that's not possible
+ * and stop using it on _WIN32 where it could
+ * cause crashes.
+ *
+ * Revision 1.111 2006/12/23 16:15:06 fabiankeil
+ * Don't prevent core dumps by catching SIGABRT.
+ * It's rude and makes debugging unreasonable painful.
+ *
+ * Revision 1.110 2006/12/13 14:52:53 etresoft
+ * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
+ *
+ * Revision 1.109 2006/12/06 19:41:40 fabiankeil
+ * Privoxy is now able to run as intercepting
+ * proxy in combination with any packet filter
+ * that does the port redirection. The destination
+ * is extracted from the "Host:" header which
+ * should be available for nearly all requests.
+ *
+ * Moved HTTP snipplets into jcc.c.
+ * Added error message for gopher proxy requests.
+ *
+ * Revision 1.108 2006/11/28 15:38:51 fabiankeil
+ * Only unlink the pidfile if it's actually used.
+ *
+ * Change order of interception checks to make
+ * it possible to block or redirect requests for
+ * the cgi pages.
+ *
+ * Revision 1.107 2006/11/13 19:05:51 fabiankeil
+ * Make pthread mutex locking more generic. Instead of
+ * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
+ * and use mutex locking unless there is an _r function
+ * available. Better safe than sorry.
+ *
+ * Fixes "./configure --disable-pthread" and should result
+ * in less threading-related problems on pthread-using platforms,
+ * but it still doesn't fix BR#1122404.
+ *
+ * Revision 1.106 2006/11/06 19:58:23 fabiankeil
+ * Move pthread.h inclusion from jcc.c to jcc.h.
+ * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
+ *
+ * Revision 1.105 2006/11/06 14:26:02 fabiankeil
+ * Don't exit after receiving the second SIGHUP on Solaris.
+ *
+ * Fixes BR 1052235, but the same problem may exist on other
+ * systems. Once 3.0.6 is out we should use sigset()
+ * where available and see if it breaks anything.
+ *
+ * Revision 1.104 2006/09/23 13:26:38 roro
+ * Replace TABs by spaces in source code.
+ *
+ * Revision 1.103 2006/09/21 12:54:43 fabiankeil
+ * Fix +redirect{}. Didn't work with -fast-redirects.
+ *
+ * Revision 1.102 2006/09/06 13:03:04 fabiankeil
+ * Respond with 400 and a short text message
+ * if the client tries to use Privoxy as FTP proxy.
+ *
+ * Revision 1.101 2006/09/06 09:23:37 fabiankeil
+ * Make number of retries in case of forwarded-connect problems
+ * a config file option (forwarded-connect-retries) and use 0 as
+ * default.
+ *
+ * Revision 1.100 2006/09/03 19:42:59 fabiankeil
+ * Set random(3) seed.
+ *
+ * Revision 1.99 2006/09/02 15:36:42 fabiankeil
+ * Follow the OpenBSD port's lead and protect the resolve
+ * functions on OpenBSD as well.
+ *
+ * Revision 1.98 2006/08/24 11:01:34 fabiankeil
+ * --user fix. Only use the user as group if no group is specified.
+ * Solves BR 1492612. Thanks to Spinor S. and David Laight.
+ *
+ * Revision 1.97 2006/08/18 15:23:17 david__schmidt
+ * Windows service (re-)integration
+ *
+ * The new args are:
+ *
+ * --install[:service_name]
+ * --uninstall[:service_name]
+ * --service
+ *
+ * They work as follows:
+ * --install will create a service for you and then terminate.
+ * By default the service name will be "privoxy" (without the quotes).
+ * However you can run multiple services if you wish, just by adding
+ * a colon and then a name (no spaces).
+ *
+ * --uninstall follows the exact same rules a --install.
+ *
+ * --service is used when the program is executed by the service
+ * control manager, and in normal circumstances would never be
+ * used as a command line argument.
+ *
+ * Revision 1.96 2006/08/15 20:12:36 david__schmidt
+ * Windows service integration
+ *
+ * Revision 1.95 2006/08/03 02:46:41 david__schmidt
+ * Incorporate Fabian Keil's patch work:
+http://www.fabiankeil.de/sourcecode/privoxy/
+ *
+ * Revision 1.94 2006/07/18 14:48:46 david__schmidt
+ * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
+ * with what was really the latest development (the v_3_0_branch branch)
+ *
+ * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
+ * Thanks to Jindrich Makovicka for a race condition fix for the log
+ * file. The race condition remains for non-pthread implementations.
+ * Reference patch #1175720.
+ *
+ * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
+ * Add the ability to check jpeg images for invalid
+ * lengths of comment blocks. Defensive strategy
+ * against the exploit:
+ * Microsoft Security Bulletin MS04-028
+ * Buffer Overrun in JPEG Processing (GDI+) Could
+ * Allow Code Execution (833987)
+ * Enabled with +inspect-jpegs in actions files.
+ *
+ * Revision 1.92.2.14 2003/12/12 12:52:53 oes
+ * - Fixed usage info for non-unix platforms
+ * - Fixed small cmdline parsing bug
+ *
+ * Revision 1.92.2.13 2003/11/27 19:20:27 oes
+ * Diagnostics: Now preserve the returncode of pthread_create
+ * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
+ *
+ * Revision 1.92.2.12 2003/07/11 11:34:19 oes
+ * No longer ignore SIGCHLD. Fixes bug #769381
+ *
+ * Revision 1.92.2.11 2003/05/14 12:32:02 oes
+ * Close jarfile on graceful exit, remove stray line
+ *
+ * Revision 1.92.2.10 2003/05/08 15:13:46 oes
+ * Cosmetics: Killed a warning, a typo and an allocation left at exit
+ *
+ * Revision 1.92.2.9 2003/04/03 15:08:42 oes
+ * No longer rely on non-POSIX.1 extensions of getcwd().
+ * Fixes bug #711001
+ *
+ * Revision 1.92.2.8 2003/03/31 13:12:32 oes
+ * Replaced setenv() by posix-compliant putenv()
+ * Thanks to Neil McCalden (nmcc AT users.sf.net).
+ *
+ * Revision 1.92.2.7 2003/03/17 16:48:59 oes
+ * Added chroot ability, thanks to patch by Sviatoslav Sviridov
+ *
+ * Revision 1.92.2.6 2003/03/11 11:55:00 oes
+ * Clean-up and extension of improvements for forked mode:
+ * - Child's return code now consists of flags RC_FLAG_*
+ * - Reporting toggle to parent now properly #ifdef'ed
+ * - Children now report blocking to parent. This enables
+ * statistics in forked mode
+ *
+ * Revision 1.92.2.5 2003/03/10 23:45:32 oes
+ * Fixed bug #700381: Non-Threaded version now capable of being toggled.
+ * Children now report having been toggled through _exit(17), parents
+ * watch for that code and toggle themselves if found.
+ *
+ * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
+ * Wrapping all *_r functions (the non-_r versions of them) with
+ * mutex semaphores for OSX. Hopefully this will take care of all
+ * of those pesky crash reports.
+ *
+ * Revision 1.92.2.3 2003/02/28 12:53:06 oes
+ * Fixed two mostly harmless mem leaks
+ *
+ * Revision 1.92.2.2 2002/11/20 14:37:47 oes
+ * Fix: Head of global clients list now initialized to NULL
+ *
+ * Revision 1.92.2.1 2002/09/25 14:52:24 oes
+ * Added basic support for OPTIONS and TRACE HTTP methods:
+ * - New interceptor direct_response() added in chat().
+ * - sed() moved to earlier in the process, so that the
+ * Host: header is evaluated before actions and forwarding
+ * are decided on.
+ *
+ * Revision 1.92 2002/05/08 16:00:46 oes
+ * Chat's buffer handling:
+ * - Fixed bug with unchecked out-of-mem conditions
+ * while reading client request & server headers
+ * - No longer predict if the buffer limit will be exceeded
+ * in the next read -- check add_to_iob's new
+ * return code. If buffer couldn't be extended
+ * (policy or out-of-mem) while
+ * - reading from client: abort
+ * - reading server headers: send error page
+ * - buffering server body for filter: flush,
+ * and if that fails: send error page
+ *
+ * Revision 1.91 2002/04/08 20:35:58 swa
+ * fixed JB spelling
+ *
+ * Revision 1.90 2002/04/02 14:57:28 oes
+ * Made sending wafers independent of FEATURE_COOKIE_JAR
+ *
+ * Revision 1.89 2002/03/31 17:18:59 jongfoster
+ * Win32 only: Enabling STRICT to fix a VC++ compile warning.
+ *
+ * Revision 1.88 2002/03/27 14:32:43 david__schmidt
+ * More compiler warning message maintenance
+ *
+ * Revision 1.87 2002/03/26 22:29:54 swa
+ * we have a new homepage!
+ *
+ * Revision 1.86 2002/03/25 17:04:55 david__schmidt
+ * Workaround for closing the jarfile before load_config() comes around again
+ *
+ * Revision 1.85 2002/03/24 15:23:33 jongfoster
+ * Name changes
+ *
+ * Revision 1.84 2002/03/24 13:25:43 swa
+ * name change related issues
+ *
+ * Revision 1.83 2002/03/16 23:54:06 jongfoster
+ * Adding graceful termination feature, to help look for memory leaks.
+ * If you enable this (which, by design, has to be done by hand
+ * editing config.h) and then go to http://i.j.b/die, then the program
+ * will exit cleanly after the *next* request. It should free all the
+ * memory that was used.
+ *
+ * Revision 1.82 2002/03/13 00:27:05 jongfoster
+ * Killing warnings
+ *
+ * Revision 1.81 2002/03/12 01:42:50 oes
+ * Introduced modular filters
+ *
+ * Revision 1.80 2002/03/11 22:07:05 david__schmidt
+ * OS/2 port maintenance:
+ * - Fixed EMX build - it had decayed a little
+ * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
+ * substituted a memset for now.
+ *
+ * Revision 1.79 2002/03/09 20:03:52 jongfoster
+ * - Making various functions return int rather than size_t.
+ * (Undoing a recent change). Since size_t is unsigned on
+ * Windows, functions like read_socket that return -1 on
+ * error cannot return a size_t.
+ *
+ * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
+ * crashes, and also frequently caused JB to jump to 100%
+ * CPU and stay there. (Because it thought it had just
+ * read ((unsigned)-1) == 4Gb of data...)
+ *
+ * - The signature of write_socket has changed, it now simply
+ * returns success=0/failure=nonzero.
+ *
+ * - Trying to get rid of a few warnings --with-debug on
+ * Windows, I've introduced a new type "jb_socket". This is
+ * used for the socket file descriptors. On Windows, this
+ * is SOCKET (a typedef for unsigned). Everywhere else, it's
+ * an int. The error value can't be -1 any more, so it's
+ * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
+ * Windows it maps to the #define INVALID_SOCKET.)
+ *
+ * - The signature of bind_port has changed.
+ *
+ * Revision 1.78 2002/03/08 21:35:04 oes
+ * Added optional group supplement to --user option. Will now use default group of user if no group given
+ *
+ * Revision 1.77 2002/03/07 03:52:06 oes
+ * - Fixed compiler warnings etc
+ * - Improved handling of failed DNS lookups
+ *
+ * Revision 1.76 2002/03/06 22:54:35 jongfoster
+ * Automated function-comment nitpicking.
+ *
+ * Revision 1.75 2002/03/06 10:02:19 oes
+ * Fixed stupid bug when --user was not given
+ *
+ * Revision 1.74 2002/03/06 00:49:31 jongfoster
+ * Fixing warning on Windows
+ * Making #ifdefs that refer to the same variable consistently
+ * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
+ *
+ * Revision 1.73 2002/03/05 23:57:30 hal9
+ * Stray character 's' on line 1618 was breaking build.
+ *
+ * Revision 1.72 2002/03/05 21:33:45 david__schmidt
+ * - Re-enable OS/2 building after new parms were added
+ * - Fix false out of memory report when resolving CGI templates when no IP
+ * address is available of failed attempt (a la no such domain)
+ *
+ * Revision 1.71 2002/03/05 18:13:56 oes
+ * Added --user option
+ *
+ * Revision 1.70 2002/03/05 04:52:42 oes
+ * Deleted non-errlog debugging code
+ *
+ * Revision 1.69 2002/03/04 23:50:00 jongfoster
+ * Splitting off bind_port() call into bind_port_helper(), with
+ * improved logging.
+ *
+ * Revision 1.68 2002/03/04 20:17:32 oes
+ * Fixed usage info
+ *
+ * Revision 1.67 2002/03/04 18:18:57 oes
+ * - Removed _DEBUG mode
+ * - Cleand up cmdline parsing
+ * - Introduced --no-daemon, --pidfile options
+ * - Cleaned up signal handling:
+ * - Terminate cleanly on INT, TERM and ABRT
+ * - Schedule logfile for re-opening on HUP
+ * - Ignore CHLD and PIPE
+ * - Leave the rest with their default handlers
+ * - Uniform handler registration
+ * - Added usage() function
+ * - Played styleguide police
+ *
+ * Revision 1.66 2002/03/03 15:06:55 oes
+ * Re-enabled automatic config reloading
+ *
+ * Revision 1.65 2002/03/03 14:49:11 oes
+ * Fixed CLF logging: Now uses client's original HTTP request
+ *
+ * Revision 1.64 2002/03/03 09:18:03 joergs
+ * Made jumbjuster work on AmigaOS again.
+ *
+ * Revision 1.63 2002/03/02 04:14:50 david__schmidt
+ * Clean up a little CRLF unpleasantness that suddenly appeared
+ *
+ * Revision 1.62 2002/02/20 23:17:23 jongfoster
+ * Detecting some out-of memory conditions and exiting with a log message.
+ *
+ * Revision 1.61 2002/01/17 21:01:52 jongfoster
+ * Moving all our URL and URL pattern parsing code to urlmatch.c.
+ *
+ * Revision 1.60 2001/12/30 14:07:32 steudten
+ * - Add signal handling (unix)
+ * - Add SIGHUP handler (unix)
+ * - Add creation of pidfile (unix)
+ * - Add action 'top' in rc file (RH)
+ * - Add entry 'SIGNALS' to manpage
+ * - Add exit message to logfile (unix)
+ *
+ * Revision 1.59 2001/12/13 14:07:18 oes
+ * Fixed Bug: 503 error page now sent OK
+ *
+ * Revision 1.58 2001/11/30 23:37:24 jongfoster
+ * Renaming the Win32 config file to config.txt - this is almost the
+ * same as the corresponding UNIX name "config"
+ *
+ * Revision 1.57 2001/11/16 00:47:43 jongfoster
+ * Changing the tty-disconnection code to use setsid().
+ *
+ * Revision 1.56 2001/11/13 20:20:54 jongfoster
+ * Tabs->spaces, fixing a bug with missing {} around an if()
+ *
+ * Revision 1.55 2001/11/13 20:14:53 jongfoster
+ * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
+ *
+ * Revision 1.54 2001/11/07 00:03:14 steudten
+ * Give reliable return value if an error
+ * occurs not just 0 with new daemon mode.
+ *
+ * Revision 1.53 2001/11/05 21:41:43 steudten
+ * Add changes to be a real daemon just for unix os.
+ * (change cwd to /, detach from controlling tty, set
+ * process group and session leader to the own process.
+ * Add DBG() Macro.
+ * Add some fatal-error log message for failed malloc().
+ * Add '-d' if compiled with 'configure --with-debug' to
+ * enable debug output.
+ *
+ * Revision 1.52 2001/10/26 20:11:20 jongfoster
+ * Fixing type mismatch
+ *
+ * Revision 1.51 2001/10/26 17:38:28 oes
+ * Cosmetics
+ *
+ * Revision 1.50 2001/10/25 03:40:48 david__schmidt
+ * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
+ * threads to call select() simultaneously. So, it's time to do a real, live,
+ * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
+ * (native). Both versions will work, but using __OS2__ offers multi-threading.
+ *
+ * Revision 1.49 2001/10/23 21:41:35 jongfoster
+ * Added call to initialize the (statically-allocated of course)
+ * "out of memory" CGI response.
+ *
+ * Revision 1.48 2001/10/10 19:56:46 jongfoster
+ * Moving some code that wasn't cookie-related out of an #ifdef
+ * FEATURE_COOKIE_JAR
+ *
+ * Revision 1.47 2001/10/10 16:44:36 oes
+ * Added CONNECT destination port limitation check
+ *
+ * Revision 1.46 2001/10/08 15:17:41 oes
+ * Re-enabled SSL forwarding
+ *
+ * Revision 1.45 2001/10/07 15:42:11 oes
+ * Replaced 6 boolean members of csp with one bitmap (csp->flags)
+ *
+ * Moved downgrading of the HTTP version from parse_http_request to
+ * chat(), since we can't decide if it is necessary before we have
+ * determined the actions for the URL. The HTTP command is now
+ * *always* re-built so the repairs need no longer be special-cased.
+ *
+ * filter_popups now gets a csp pointer so it can raise the new
+ * CSP_FLAG_MODIFIED flag.
+ *
+ * Bugfix
+ *
+ * Added configurable size limit for the IOB. If the IOB grows so
+ * large that the next read would exceed the limit, the header
+ * is generated, and the header & unfiltered buffer are flushed
+ * to the client. Chat then continues in non-buffering,
+ * non-filtering body mode.
+ *
+ * Revision 1.44 2001/10/02 18:13:57 oes
+ * Ooops
+ *
+ * Revision 1.43 2001/10/02 15:32:13 oes
+ * Moved generation of hdr
+ *
+ * Revision 1.42 2001/09/21 23:02:02 david__schmidt
+ * Cleaning up 2 compiler warnings on OS/2.
+ *
+ * Revision 1.41 2001/09/16 17:05:14 jongfoster
+ * Removing unused #include showarg.h
+ *
+ * Revision 1.40 2001/09/16 15:41:45 jongfoster
+ * Fixing signed/unsigned comparison warning.
+ *
+ * Revision 1.39 2001/09/16 13:21:27 jongfoster
+ * Changes to use new list functions.
+ *
+ * Revision 1.38 2001/09/16 13:01:46 jongfoster
+ * Removing redundant function call that zeroed zalloc()'d memory.
+ *
+ * Revision 1.37 2001/09/10 11:12:24 oes
+ * Deleted unused variable
+ *
+ * Revision 1.36 2001/09/10 10:56:15 oes
+ * Silenced compiler warnings
+ *
+ * Revision 1.35 2001/07/31 14:44:22 oes
+ * Deleted unused size parameter from filter_popups()
+ *
+ * Revision 1.34 2001/07/30 22:08:36 jongfoster
+ * Tidying up #defines:
+ * - All feature #defines are now of the form FEATURE_xxx
+ * - Permanently turned off WIN_GUI_EDIT
+ * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
+ *
+ * Revision 1.33 2001/07/29 19:32:00 jongfoster
+ * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
+ *
+ * Revision 1.32 2001/07/29 18:47:05 jongfoster
+ * Adding missing #include "loadcfg.h"
+ *
+ * Revision 1.31 2001/07/29 12:17:48 oes
+ * Applied pthread fix by Paul Lieverse
+ *
+ * Revision 1.30 2001/07/25 22:57:13 jongfoster
+ * __BEOS__ no longer overrides FEATURE_PTHREAD.
+ * This is because FEATURE_PTHREAD will soon be widely used, so I
+ * want to keep it simple.
+ *
+ * Revision 1.29 2001/07/24 12:47:06 oes
+ * Applied BeOS support update by Eugenia
+ *
+ * Revision 1.28 2001/07/23 13:26:12 oes
+ * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
+ *
+ * Revision 1.27 2001/07/19 19:09:47 haroon
+ * - Added code to take care of the situation where while processing the first
+ * server response (which includes the server header), after finding the end
+ * of the headers we were not looking past the end of the headers for
+ * content modification. I enabled it for filter_popups.
+ * Someone else should look to see if other similar operations should be
+ * done to the discarded portion of the buffer.
+ *
+ * Note 2001/07/20: No, the other content modification mechanisms will process
+ * the whole iob later anyway. --oes
+ *
+ * Revision 1.26 2001/07/18 12:31:36 oes
+ * cosmetics
+ *
+ * Revision 1.25 2001/07/15 19:43:49 jongfoster
+ * Supports POSIX threads.
+ * Also removed some unused #includes.
+ *
+ * Revision 1.24 2001/07/13 14:00:40 oes
+ * - Generic content modification scheme:
+ * Each feature has its own applicability flag that is set
+ * from csp->action->flags.
+ * Replaced the "filtering" int flag , by a function pointer
+ * "content_filter" to the function that will do the content
+ * modification. If it is != NULL, the document will be buffered
+ * and processed through *content_filter, which must set
+ * csp->content_length and return a modified copy of the body
+ * or return NULL (on failiure).
+ * - Changed csp->is_text to the more generic bitmap csp->content_type
+ * which can currently take the valued CT_TEXT or CT_GIF
+ * - Reformatting etc
+ * - Removed all #ifdef PCRS
+ *
+ * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
+ * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
+ * the `block_acl' call. This prevents a compilation error when the user
+ * does not wish to use the "ACL" feature.
+ *
+ * Revision 1.22 2001/06/29 21:45:41 oes
+ * Indentation, CRLF->LF, Tab-> Space
+ *
+ * Revision 1.21 2001/06/29 13:29:36 oes
+ * - Cleaned up, improved comments
+ * - Unified all possible interceptors (CGI,
+ * block, trust, fast_redirect) in one
+ * place, with one (CGI) answer generation
+ * mechansim. Much clearer now.
+ * - Removed the GIF image generation, which
+ * is now done in filters.c:block_url()
+ * - Made error conditions like domain lookup
+ * failiure or (various) problems while talking
+ * to the server use cgi.c:error_response()
+ * instead of generating HTML/HTTP in chat() (yuck!)
+ * - Removed logentry from cancelled commit
+ *
+ * Revision 1.20 2001/06/09 10:55:28 jongfoster
+ * Changing BUFSIZ ==> BUFFER_SIZE
+ *
+ * Revision 1.19 2001/06/07 23:12:52 jongfoster
+ * Replacing function pointer in struct gateway with a directly
+ * called function forwarded_connect().
+ * Replacing struct gateway with struct forward_spec
+ *
+ * Revision 1.18 2001/06/03 19:12:16 oes
+ * introduced new cgi handling
+ *
+ * Revision 1.17 2001/06/01 20:07:23 jongfoster
+ * Now uses action +image-blocker{} rather than config->tinygif
+ *
+ * Revision 1.16 2001/06/01 18:49:17 jongfoster
+ * Replaced "list_share" with "list" - the tiny memory gain was not
+ * worth the extra complexity.
+ *
+ * Revision 1.15 2001/05/31 21:24:47 jongfoster
+ * Changed "permission" to "action" throughout.
+ * Removed DEFAULT_USER_AGENT - it must now be specified manually.
+ * Moved vanilla wafer check into chat(), since we must now
+ * decide whether or not to add it based on the URL.
+ *
+ * Revision 1.14 2001/05/29 20:14:01 joergs
+ * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
+ * increased.
+ *
+ * Revision 1.13 2001/05/29 09:50:24 jongfoster
+ * Unified blocklist/imagelist/permissionslist.
+ * File format is still under discussion, but the internal changes
+ * are (mostly) done.
+ *
+ * Also modified interceptor behaviour:
+ * - We now intercept all URLs beginning with one of the following
+ * prefixes (and *only* these prefixes):
+ * * http://i.j.b/
+ * * http://ijbswa.sf.net/config/
+ * * http://ijbswa.sourceforge.net/config/
+ * - New interceptors "home page" - go to http://i.j.b/ to see it.
+ * - Internal changes so that intercepted and fast redirect pages
+ * are not replaced with an image.
+ * - Interceptors now have the option to send a binary page direct
+ * to the client. (i.e. ijb-send-banner uses this)
+ * - Implemented show-url-info interceptor. (Which is why I needed
+ * the above interceptors changes - a typical URL is
+ * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
+ * The previous mechanism would not have intercepted that, and
+ * if it had been intercepted then it then it would have replaced
+ * it with an image.)
+ *
+ * Revision 1.12 2001/05/27 22:17:04 oes
+ *
+ * - re_process_buffer no longer writes the modified buffer
+ * to the client, which was very ugly. It now returns the
+ * buffer, which it is then written by chat.
+ *
+ * - content_length now adjusts the Content-Length: header
+ * for modified documents rather than crunch()ing it.
+ * (Length info in csp->content_length, which is 0 for
+ * unmodified documents)
+ *
+ * - For this to work, sed() is called twice when filtering.
+ *
+ * Revision 1.11 2001/05/26 17:27:53 jongfoster
+ * Added support for CLF and fixed LOG_LEVEL_LOG.
+ * Also did CRLF->LF fix of my previous patch.
+ *