Merge branch 'release-0.7' of github.com:roundcube/roundcubemail into release-0.7

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix (workaround) delete operations with some versions of memcache (#1488592)
 - Fix wrong compose screen elements focus in IE9 (#1488541)
 - Fix redirect to mail/compose on re-login (#1488226)
 - Add IE8 hack for messages list issue (#1487821)

program/include/rcube_cache.php

@@ -461,10 +461,13 @@ class rcube_cache
      */
     private function delete_record($key, $index=true)
     {
-        if ($this->type == 'memcache')
-            $this->db->delete($this->ckey($key));
-        else
+        if ($this->type == 'memcache') {
+            // #1488592: use 2nd argument
+            $this->db->delete($this->ckey($key), 0);
+        }
+        else {
             apc_delete($this->ckey($key));
+        }
 
         if ($index) {
             if (($idx = array_search($key, $this->index)) !== false) {

program/include/rcube_session.php

@@ -319,7 +319,8 @@ class rcube_session
    */
   public function mc_destroy($key)
   {
-    $ret = $this->memcache->delete($key);
+    // #1488592: use 2nd argument
+    $ret = $this->memcache->delete($key, 0);
     if ($this->mc_debug) write_log('memcache', "delete($key): " . ($ret ? 'OK' : 'ERR'));
     return $ret;
   }