+/*
+ * Determining parent proxies
+ */
+extern const struct forward_spec *forward_url(struct http_request *http, struct client_state *csp);
+
+/*
+ * Content modification
+ */
+extern char *pcrs_filter_response(struct client_state *csp);
+extern char *gif_deanimate_response(struct client_state *csp);
+extern char *jpeg_inspect_response(struct client_state *csp);
+extern size_t remove_chunked_transfer_coding(char *buffer, const size_t size);
+extern char *execute_single_pcrs_command(char *subject, const char *pcrs_command, int *hits);
+extern char *rewrite_url(char *old_url, const char *pcrs_command);
+extern char *get_last_url(char *subject, const char *redirect_mode);
+
+extern pcrs_job *compile_dynamic_pcrs_job_list(const struct client_state *csp, const struct re_filterfile_spec *b);