Dont hide exceptions master

Fix master unit test: Clear leftover shares from other tests 

block cron when in single user mode

Catch more exceptions in DAV client

Added InvalidArgumentException to catch HTML parsing errors when XML was
expected.
Made convertSabreException more generic to be able to handle more
exception cases.

fix share input loading spinner, fix #15522

fixing #15396 & #15397

Conflicts:
	apps/files_encryption/lib/util.php
	apps/files_encryption/tests/hooks.php

Conflicts:
	apps/user_ldap/tests/user_ldap.php

Conflicts:
	core/templates/login.php
	lib/base.php

Properly catch guzzle 503 when querying share info

[command] delete orphaned file cache entries

Add password input from env variable for occ user:{add, resetpassword}

ajax/share.php should return correct list of suggestions

LDAP Wizard Overhaul

only create a db entry for the user in case of a name conflict on group share

change default value of ldap_tls to 0. It will be detected anyway, but starting with 0 will lead to errors and unconfigurability

Don't stop event execution for menu item click

Fix typos and some other adjustments

fixes #15326

* fixes #12326 - the settings menu is closed now, because the event is executed

Keep shares when deleting shared folders

Disallow Windows Server in Server Check