Files: also check if the source path is valid when doing a rename or copy operation
Disallow URLs containing a @
LDAP: reset user/group-config association only after exists-check, may performance in some cases
Fix ugly error style on install

By initializing the template engine first we can show the
'Can't write into config directory 'config'' error in a nice way instead
of plain unstyled HTML.
External Storage: Check for curl in PHP

If no curl is found, disable the storage that needs it.
Merge pull request #3077 from owncloud/rename-checksourcepath

Files: also check if the source path is valid when doing a rename or copy operation
Merge pull request #3082 from owncloud/ldap_confcache_opt

LDAP: reset user/group-config association only after exists-check, may p...
Merge pull request #3092 from guruz/external_storage_check_for_curl

External Storage: Check for curl in PHP
Merge pull request #3080 from owncloud/validate_redirect_mast

Disallow URLs containing a @
[tx-robot] updated from transifex
Merge pull request #3089 from guruz/fix_ugly_config_writeability_error

Fix ugly error style on install