carrierroute: more details on error message checking file permissions

- GH #2369

(cherry picked from commit 31c7493d0d822239a76df4b504b2c319de09c19c)
(cherry picked from commit 77a8fab36f878938cfd1b630439b9d0bde2f975b)

src/modules/carrierroute/carrierroute.c

@@ -230,7 +230,8 @@ static int mod_init(void) {
 		if( !( fs.st_mode & S_IWOTH) &&
 			!((fs.st_mode & S_IWGRP) && (fs.st_gid == gid)) &&
 			!((fs.st_mode & S_IWUSR) && (fs.st_uid == uid))) {
-				LM_ERR("config file %s not writable\n", config_file);
+				LM_ERR("config file %s not writable or not owned by uid: %d and gid: %d\n",
+						config_file, uid, gid);
 				return -1;
 		}
 	}