Merge pull request #5389 from owncloud/fix_shell_exec

only call shell_exec if enabled
update 3rdparty submodule
Fixed zip download button for unlimited filesize in public mode

Added missing condition to check whenever allowed zip size is unlimited.

Fixes #3717
split up reset()['path'] to make it compatible with older PHP versions
Move OC_Connector_Sabre_Server to expected location.
Merge pull request #5394 from owncloud/sabre-server-location

Move OC_Connector_Sabre_Server to expected location.
add options to disable the check for a working .htaccess file in data and for a working WebDAV server. This are advanced settings that are needed in special situations where our check fail and the user runs into an http timeout.
Fix sharing error message - id -> file name

fixe #2827
Merge pull request #5392 from owncloud/update-3rdparty-submodule

update 3rdparty submodule
Merge pull request #5393 from owncloud/files-downloadzipwhenzipsizeiszero

Fixed zip download button for unlimited filesize in public mode
Doc fix
LDAP: move Configuration  out of Connection into class of its own. The new wizard requires it.
First stage of new Wizard, neither feature complete nor ready
Simplify WizardResult
ignore autodetect-attribute on public save method
LDAP Wizard: autodetect base DN
LDAP Wizard: add detection, load and save of LDAP objectClasses for filter purposes
css cleanup
Remove debug output
LDAP Wizard: add detection, load and save of LDAP groups for filter purposes