Datalogstatus notification implementation (as discussed: https://www.howtoforge.com/community/threads/datalogstatus.73719/)

Fixed #4057 Remote API: some API calls are not working because the form definition files are missing

Fixed #4052 open_basedir contains client0 where it should contain client1 when value is taken from System default

Fixed #2738 Installing package from APS to root of subdomain fails when/if. Thanks to @gardan for the patch.

Fixed #4043 3.1 Remote API - client_add: sys_user insert fails if client parameter 'usertheme' is empty

Added "DATE" form type that works like the "DATETIME" type incl. date picker, just without time details.

- Changed default value for expire of ftp user, should have fixed: #3862

Fixed: Issue #3819 v3.1 Unescaped strings in language files after installation vs source throws 500 error

if the filter rule uses "begins with", the regex should be "^$searchterm" instead of " $searchterm"