Move \OC\Share to PSR-4

Adds functionality to submit comment on ctrl+Enter

Add occ commands to enable and disable a user + a disabled user can n…

Allow login by email address

free up memory when releasing the last shared lock

Declare cron jobs in info.xml

Improve server container

Use a CappedCache in the user database backend

Move from OC_Log_XX to \OC\Log

Add locking to modifying operation of the OCS Share API

When running with a user database backend on large installations the
cache can grow to significant sizes. This can be especially problematic
when running big cron/repair jobs.

Move OC_Archive to \OC\Archive and PSR-4

PSR-4 for apps

Cleanup Files_Sharing CLASSPATH

Use correct typehint for the IProviderFactory

Move activity manager to the namespace

closes #24302

* Move out of legacy folder
* Move to proper namespace
* Fix calling code

* Fix code
* Fix tests

Adding repair steps for install and uninstall 

add ISession::getId() wrapper for session_id

* OC\Files\Cache\SharedScanner
* OC\Files\Cache\Shared_Cache
* OC\Files\Cache\Shared_Permissions
* OC\Files\Cache\Shared_Updater
* OC\Files\Cache\Shared_Watcher
* OCA\Files\Share\Maintainer
* OCA\Files\Share\Proxy

Merge pull request #24336 from owncloud/issue-24328-remove-password-from-exception-trace-in-dav-auth

Remove the password from the validateUserPass() method as well

Fix undefined variable $ex