+ * Revision 1.120 2008/01/04 17:43:45 fabiankeil
+ * Improve the warning messages that get logged if the action files
+ * "enable" filters but no filters of that type have been loaded.
+ *
+ * Revision 1.119 2007/12/28 18:32:51 fabiankeil
+ * In server_content_type():
+ * - Don't require leading white space when detecting image content types.
+ * - Change '... not replaced ...' message to sound less crazy if the text
+ * type actually is 'text/plain'.
+ * - Mark the 'text/plain == binary data' assumption for removal.
+ * - Remove a bunch of trailing white space.
+ *
+ * Revision 1.118 2007/12/28 16:56:35 fabiankeil
+ * Minor server_content_disposition() changes:
+ * - Don't regenerate the header name all lower-case.
+ * - Some white space fixes.
+ * - Remove useless log message in case of ENOMEM.
+ *
+ * Revision 1.117 2007/12/06 18:11:50 fabiankeil
+ * Garbage-collect the code to add a X-Forwarded-For
+ * header as it seems to be mostly used by accident.
+ *
+ * Revision 1.116 2007/12/01 13:04:22 fabiankeil
+ * Fix a crash on mingw32 with some Last Modified times in the future.
+ *
+ * Revision 1.115 2007/11/02 16:52:50 fabiankeil
+ * Remove a "can't happen" error block which, over
+ * time, mutated into a "guaranteed to happen" block.
+ *
+ * Revision 1.114 2007/10/19 16:56:26 fabiankeil
+ * - Downgrade "Buffer limit reached" message to LOG_LEVEL_INFO.
+ * - Use shiny new content_filters_enabled() in client_range().
+ *
+ * Revision 1.113 2007/10/10 17:29:57 fabiankeil
+ * I forgot about Poland.
+ *
+ * Revision 1.112 2007/10/09 16:38:40 fabiankeil
+ * Remove Range and If-Range headers if content filtering is enabled.
+ *
+ * Revision 1.111 2007/10/04 18:07:00 fabiankeil
+ * Move ACTION_VANILLA_WAFER handling from jcc's chat() into
+ * client_cookie_adder() to make sure send-vanilla-wafer can be
+ * controlled through tags (and thus regression-tested).
+ *
+ * Revision 1.110 2007/09/29 10:42:37 fabiankeil
+ * - Remove "scanning headers for" log message again.
+ * - Some more whitespace fixes.
+ *
+ * Revision 1.109 2007/09/08 14:25:48 fabiankeil
+ * Refactor client_referrer() and add conditional-forge parameter.
+ *
+ * Revision 1.108 2007/08/28 18:21:03 fabiankeil
+ * A bunch of whitespace fixes, pointy hat to me.
+ *
+ * Revision 1.107 2007/08/28 18:16:32 fabiankeil
+ * Fix possible memory corruption in server_http, make sure it's not
+ * executed for ordinary server headers and mark some problems for later.
+ *
+ * Revision 1.106 2007/08/18 14:30:32 fabiankeil
+ * Let content-type-overwrite{} honour force-text-mode again.
+ *
+ * Revision 1.105 2007/08/11 14:49:49 fabiankeil
+ * - Add prototpyes for the header parsers and make them static.
+ * - Comment out client_accept_encoding_adder() which isn't used right now.
+ *
+ * Revision 1.104 2007/07/14 07:38:19 fabiankeil
+ * Move the ACTION_FORCE_TEXT_MODE check out of
+ * server_content_type(). Signal other functions
+ * whether or not a content type has been declared.
+ * Part of the fix for BR#1750917.
+ *
+ * Revision 1.103 2007/06/01 16:31:54 fabiankeil
+ * Change sed() to return a jb_err in preparation for forward-override{}.
+ *
+ * Revision 1.102 2007/05/27 12:39:32 fabiankeil
+ * Adjust "X-Filter: No" to disable dedicated header filters.
+ *
+ * Revision 1.101 2007/05/14 10:16:41 fabiankeil
+ * Streamline client_cookie_adder().
+ *
+ * Revision 1.100 2007/04/30 15:53:11 fabiankeil
+ * Make sure filters with dynamic jobs actually use them.
+ *
+ * Revision 1.99 2007/04/30 15:06:26 fabiankeil
+ * - Introduce dynamic pcrs jobs that can resolve variables.
+ * - Remove unnecessary update_action_bits_for_all_tags() call.
+ *
+ * Revision 1.98 2007/04/17 18:32:10 fabiankeil
+ * - Make tagging based on tags set by earlier taggers
+ * of the same kind possible.
+ * - Log whether or not new tags cause action bits updates
+ * (in which case a matching tag-pattern section exists).
+ * - Log if the user tries to set a tag that is already set.
+ *
+ * Revision 1.97 2007/04/15 16:39:21 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 1.96 2007/04/12 12:53:58 fabiankeil
+ * Log a warning if the content is compressed, filtering is
+ * enabled and Privoxy was compiled without zlib support.
+ * Closes FR#1673938.
+ *
+ * Revision 1.95 2007/03/25 14:26:40 fabiankeil
+ * - Fix warnings when compiled with glibc.
+ * - Don't use crumble() for cookie crunching.
+ * - Move cookie time parsing into parse_header_time().
+ * - Let parse_header_time() return a jb_err code
+ * instead of a pointer that can only be used to
+ * check for NULL anyway.
+ *
+ * Revision 1.94 2007/03/21 12:23:53 fabiankeil
+ * - Add better protection against malicious gzip headers.
+ * - Stop logging the first hundred bytes of decompressed content.
+ * It looks like it's working and there is always debug 16.
+ * - Log the content size after decompression in decompress_iob()
+ * instead of pcrs_filter_response().
+ *
+ * Revision 1.93 2007/03/20 15:21:44 fabiankeil
+ * - Use dedicated header filter actions instead of abusing "filter".
+ * Replace "filter-client-headers" and "filter-client-headers"
+ * with "server-header-filter" and "client-header-filter".
+ * - Remove filter_client_header() and filter_client_header(),
+ * filter_header() now checks the shiny new
+ * CSP_FLAG_CLIENT_HEADER_PARSING_DONE flag instead.
+ *
+ * Revision 1.92 2007/03/05 13:25:32 fabiankeil
+ * - Cosmetical changes for LOG_LEVEL_RE_FILTER messages.
+ * - Handle "Cookie:" and "Connection:" headers a bit smarter
+ * (don't crunch them just to recreate them later on).
+ * - Add another non-standard time format for the cookie
+ * expiration date detection.
+ * - Fix a valgrind warning.
+ *
+ * Revision 1.91 2007/02/24 12:27:32 fabiankeil
+ * Improve cookie expiration date detection.
+ *
+ * Revision 1.90 2007/02/08 19:12:35 fabiankeil
+ * Don't run server_content_length() the first time
+ * sed() parses server headers; only adjust the
+ * Content-Length header if the page was modified.
+ *
+ * Revision 1.89 2007/02/07 16:52:11 fabiankeil
+ * Fix log messages regarding the cookie time format
+ * (cookie and request URL were mixed up).
+ *
+ * Revision 1.88 2007/02/07 11:27:12 fabiankeil
+ * - Let decompress_iob()
+ * - not corrupt the content if decompression fails
+ * early. (the first byte(s) were lost).
+ * - use pointer arithmetics with defined outcome for
+ * a change.
+ * - Use a different kludge to remember a failed decompression.
+ *