LDAP: version bump -> clean up database

apps/user_ldap/appinfo/update.php

@@ -87,4 +87,7 @@ if(!isset($connector)) {
 }
 //it is required, that connections do have ldap_configuration_active setting stored in the database
 $connector->getConfiguration();
-$connector->saveConfiguration();
+$connector->saveConfiguration();
+
+// we don't save it anymore, was a well-meant bad idea
+\OC_Preferences::deleteKey('%', 'user_ldap' , 'homedir');

apps/user_ldap/appinfo/version

@@ -1 +1 @@
-0.3.9.0
+0.3.9.1