restore FPM compatibility with mod_fastcgi broken since php#694 / 67541, fixes bug 67606

Author: dzuelke

sapi/fpm/fpm/fpm_main.c

@@ -1142,13 +1142,16 @@ static void init_request_info(TSRMLS_D)
 				TRANSLATE_SLASHES(env_document_root);
 			}
 
-			if (env_path_translated != NULL && env_redirect_url != NULL &&
+			if (!apache_was_here && env_path_translated != NULL && env_redirect_url != NULL &&
 			    env_path_translated != script_path_translated &&
 			    strcmp(env_path_translated, script_path_translated) != 0) {
 				/*
 				 * pretty much apache specific.  If we have a redirect_url
 				 * then our script_filename and script_name point to the
 				 * php executable
+				 * we don't want to do this for the new mod_proxy_fcgi approach,
+				 * where redirect_url may also exist but the below will break
+				 * with rewrites to PATH_INFO, hence the !apache_was_here check
 				 */
 				script_path_translated = env_path_translated;
 				/* we correct SCRIPT_NAME now in case we don't have PATH_INFO */
@@ -1323,7 +1326,7 @@ static void init_request_info(TSRMLS_D)
 					efree(pt);
 				}
 			} else {
-				/* make sure path_info/translated are empty */
+				/* make sure original values are remembered in ORIG_ copies if we've changed them */
 				if (!orig_script_filename ||
 					(script_path_translated != orig_script_filename &&
 					strcmp(script_path_translated, orig_script_filename) != 0)) {
@@ -1332,7 +1335,9 @@ static void init_request_info(TSRMLS_D)
 					}
 					script_path_translated = _sapi_cgibin_putenv("SCRIPT_FILENAME", script_path_translated TSRMLS_CC);
 				}
-				if (env_redirect_url) {
+				if (!apache_was_here && env_redirect_url) {
+					/* if we used PATH_TRANSLATED to work around Apache mod_fastcgi (but not mod_proxy_fcgi,
+					 * hence !apache_was_here) weirdness, strip info accordingly */
 					if (orig_path_info) {
 						_sapi_cgibin_putenv("ORIG_PATH_INFO", orig_path_info TSRMLS_CC);
 						_sapi_cgibin_putenv("PATH_INFO", NULL TSRMLS_CC);