Removed special handling of part files in shared storage rename

Fixing apache login

add command line option to get user number statistics

This fixes the issue introduced by the transfer id which itself wasn't
taken into account by the shortcut code for part file in the shared
storage class.

Fix ownCloud for php5.3.x

Prevent deleting storage root

Storage mount points are not deletable, so make sure that the unlink
operation and its hooks aren't run in such cases.

Note that some storages might recursively delete their contents when
calling unlink on their root. This fix prevents that as well.

Enforce required phpunit version

LDAP: implement userCount action. This required to (finally) clean up and refactor the search method, which will have a positive performance impact on paged search.

turn off mod_pagespeed

Added ownCloud backend for external storage