Fix bug where creating subfolders in shared folders wasn't possible without ACL extension (#1490113)

CHANGELOG

@@ -11,6 +11,7 @@ CHANGELOG Roundcube Webmail
 - Fix handling of uuencoded messages if messages_cache is enabled (#1490108)
 - Fix handling of base64-encoded attachments with extra spaces (#1490111)
 - Fix handling of UNKNOWN-CTE response, try do decode content client-side (#1490046)
+- Fix bug where creating subfolders in shared folders wasn't possible without ACL extension (#1490113)
 
 RELEASE 1.0.3
 -------------

program/steps/settings/save_folder.inc

@@ -70,7 +70,9 @@ else {
 }
 
 // Check access rights to the parent folder
-if (!$error && strlen($path) && (!strlen($old_imap) || $old_imap != $name_imap)) {
+if (!$error && strlen($path) && (!strlen($old_imap) || $old_imap != $name_imap)
+    && $STORAGE->get_capability('ACL')
+) {
     $parent_opts = $STORAGE->folder_info($path);
     if ($parent_opts['namespace'] != 'personal'
         && (empty($parent_opts['rights']) || !preg_match('/[ck]/', implode($parent_opts['rights'])))