Merge pull request #496 in ZP/z-push from...

Merge pull request #496 in ZP/z-push from bugfix/ZP-250-meta-ticket-for-documentation-typo to develop

* commit 'f9e1ffab':
  ZP-250 Don't log logon failes as WARN as the error code is logged already.

src/backend/kopano/kopano.php

@@ -166,7 +166,7 @@ class BackendKopano implements IBackend, ISearchProvider {
         }
 
         if(!$this->session) {
-            ZLog::Write(LOGLEVEL_WARN, sprintf("KopanoBackend->Logon(): logon failed for user '%s'", $user));
+            ZLog::Write(LOGLEVEL_DEBUG, sprintf("KopanoBackend->Logon(): logon failed for user '%s'", $user));
             $this->defaultstore = false;
             return false;
         }