Reset internal cache index in close()

Conflicts:

	program/lib/Roundcube/rcube_cache.php
	program/lib/Roundcube/rcube_cache_shared.php

program/lib/Roundcube/rcube_cache.php

@@ -242,6 +242,9 @@ class rcube_cache
         }
 
         $this->write_index();
+
+        // reset internal cache index, thanks to this we can force index reload
+        $this->index = null;
     }
 
 

program/lib/Roundcube/rcube_cache_shared.php

@@ -237,6 +237,9 @@ class rcube_cache_shared
         }
 
         $this->write_index();
+
+        // reset internal cache index, thanks to this we can force index reload
+        $this->index = null;
     }