[mod_proxy,mod_scgi] fix truncated error trace

src/mod_proxy.c

@@ -1386,7 +1386,7 @@ static handler_t proxy_write_request(server *srv, handler_ctx *hctx) {
 				return HANDLER_ERROR;
 			}
 			if (socket_error != 0) {
-				log_error_write(srv, __FILE__, __LINE__, "ss",
+				log_error_write(srv, __FILE__, __LINE__, "sssd",
 						"establishing connection failed:", strerror(socket_error),
 						"port:", hctx->host->port);
 

src/mod_scgi.c

@@ -1950,7 +1950,7 @@ static handler_t scgi_write_request(server *srv, handler_ctx *hctx) {
 				if (!hctx->proc->is_local || hctx->conf.debug) {
 					/* local procs get restarted */
 
-					log_error_write(srv, __FILE__, __LINE__, "ss",
+					log_error_write(srv, __FILE__, __LINE__, "sssd",
 							"establishing connection failed:", strerror(socket_error),
 							"port:", hctx->proc->port);
 				}