Here's a quick, first cut using a basic tool, cppcheck.  Also see the item at the bottom which is from compiler warnings.
                
                cppcheck output:
                
                [./mod_psiphon_db_to_cookie.c:100]: Memory leak: tm
                [./mod_test.c:245]: Resource leak: f
                [./proxy/proxy_util.c:2885]: Memory leak: tm
                
                Here are the files.  Review my fixes in rev 967.
                
                =======================================================
                
                ./mod_psiphon_db_to_cookie.c
                
                No frees on return, so this does look like a memory leak.  What's sizeof(*tm), shouldn't it be sizeof(struct tm)?  Wait, why is there am allocation here at all?  It looks like the pointer to the allocated memory is overwritten ("tm = gmtime(&t)") and the allocated memory is never referenced..  Also, should use thread-safe gtime_r (http://www.opengroup.org/onlinepubs/009695399/functions/gmtime.html).
                
                =======================================================
                
                struct tm *tm = malloc(sizeof(*tm));
                time_t t = time(NULL);
                char *tstr;
                
                dbtc_log("dbtc()");
                
                dconf = (struct_dbtc_dir_config *) ap_get_module_config(r->per_dir_config,
                &psiphon_db_to_cookie_module);
                
                if (!dconf->need_dbtc) {
                dbtc_log("dbtc(): no need dbtc");
                return DECLINED;
                };
                
                if (r->main != NULL)  /*no subrequests*/
                {
                dbtc_log("dbtc(): not a main request");
                return DECLINED;
                }
                tm = gmtime(&t);
                t = mktime(tm);
                tstr = apr_psprintf(r->pool, "%d", t);
                
                =======================================================
                
                ./mod_test.c
                
                File f isn't closed.  Is this just a test routine?  Should fix anyways.  Should this file be removed before open source?
                
                =======================================================
                
                int test_hook(request_rec *r) {
                struct_test_dir_config *dconf;
                char body[MAX_BODY];
                //    const char *body = "here is line\r\nhere IS digits: 12345\r\nqqqq\n";
                const char *result;
                
                regs_v_t **regs_v;
                FILE *f;
                
                jsf_log("test_hook()");
                
                dconf = (struct_test_dir_config *) ap_get_module_config(r->per_dir_config,
                &test_module);
                
                if (!dconf->enable) {
                jsf_log("test_hook(): don't need test");
                return DECLINED;
                };
                
                jsf_log("test_hook(): running");
                
                ap_set_content_type(r, "text/plain");
                
                if (!(f = fopen("/var/tmp/test.js", "r"))) {
                jsf_err_log("test_hook(): Can't open a file");
                return OK;
                }
                
                regs_v = jsf_init1(r);
                if (!regs_v) jsf_err_log("test_hook(): no regs_v");
                
                /*
                while (!feof(f)) {
                if (fgets(body, MAX_BODY, f)) {
                if (regs_v) {
                result = jsf(r, regs_v, body, strlen(body));
                } else {
                result = body;
                }
                
                ap_rprintf(r, "%s", result);
                }
                }
                
                fclose(f);
                */
                return OK;
                }
                
                =======================================================
                
                ./proxy/proxy_util.c
                
                Same as 1st case, memory leak.
                
                =======================================================
                struct tm *tm = malloc(sizeof(*tm));
                time_t t = time(NULL);
                char *tstr;
                
                
                
                
                ctdb_log("ap_proxy_cookie_to_db(\"%s\")", val);
                
                tm = gmtime(&t);
                t = mktime(tm);
                tstr = apr_psprintf(r->pool, "%d", (int)t);
                
                
                
                if (!(dbd = ap_dbd_acquire(r))) {
                ctdb_err_log("ctdb(): Can't get DB connect");
                return;
                }
                =======================================================
                
                From compiler warnings:
                
                mod_map_to_proxy.c: In function ‘hook_uri2proxy’:
                mod_map_to_proxy.c:166: warning: too few arguments for format
                
                if(!*decrypted_uri)
                {
                if (ap_is_default_port(port, r))
                {
                return_url=apr_psprintf(r->pool, "%s://%s%s/", ap_http_scheme(r),
                ap_get_server_name(r), conf->loc);
                }
                else
                {
                return_url=apr_psprintf(r->pool, "%s://%s:%u%s/", ap_http_scheme(r),
                ap_get_server_name(r), port);
                }
                
                apr_table_setn(r->err_headers_out, "Location", return_url);
                return HTTP_MOVED_TEMPORARILY;
                
                }