adblock: release 4.4.0-1

adblock: release 4.4.0-1

* added a 'DNS Shift' option, where the generated final DNS blocklist is moved to the backup directory and
   only a soft link to this file is set in memory. As long as your backup directory is located on an external drive,
   you should activate this option to save disk space
* added ETAG-Header support to make sure to download only feeds that has been changed,
   use backups otherwise (not supported by uclient-fetch)
* removed aria2 support
* added brave as a new safesearch provider
* removed the racist terminology from the local lists and renamed it to "allowlist" and "blocklist"
* removed the 'list' and 'timer' function from init, use the LuCI feed editor and the standard cron frontend instead
* various  code changes and improvements
* major LuCI frontend changes, incl. a custom feed editor (separate commit)
* partial readme update

Signed-off-by: Dirk Brenken <redacted>