Conflicts:
	lib/filesystemview.php

Check if user is already logged in for DAV auth, instead of logging in and creating new sessions for every request

- update script to fix broken properties in the database

This reverts commit 9af74a9c.

fopen() didn't work for large files on some servers while readfile()
seems to work for all files on all configurations.

Two important fixes after 4.0.3

Only call OC_FileCache::get('/Shared') if it exists in the file cache, prevents premature addition of the Shared folder to the file cache