sql: limit 1 for UPDATE and DELETE is not supported by the SQL standard and postgresql

(see: https://www.postgresql.org/message-id/flat/1291109101.26137.35.camel%40pcd12478 )

include/group.php

@@ -18,7 +18,7 @@ function group_add($uid,$name,$public = 0) {
 				intval($r)
 			);
 			if(($z) && $z[0]['deleted']) {
-				/*$r = q("UPDATE groups SET deleted = 0 WHERE uid = %d AND gname = '%s' LIMIT 1",
+				/*$r = q("UPDATE groups SET deleted = 0 WHERE uid = %d AND gname = '%s'",
 					intval($uid),
 					dbesc($name)
 				);*/