Remove the template autoescaping

Ref #1963
[Files] Use p() instead of echo
[Files] Use htmlspecialchars()
[files_encryption] Use p() instead of echo()
[files_external] From echo to p
[files_sharing] From echo to p
[files] Unescape file size
[files_trashbin] From echo to p
[files_versions] From echo to p
[user_ldap] From echo to p
[user_webdavauth] From echo to p
Remove uneeded file
[core] From echo to p
Add a missing )
Typo...
Remove uneeded OAuth files
Merge master
[Files] Use p() instead of echo
Merge master
Sed was wrong