- update to 4.8.3:
* Optimized code paths wherever regular expressions are parsed
* Fixed logging of internal enum values in debug messages
* Fix locations being hidden when hiding local computer per
configuration and using the NetworkDiscovery add-on
* Fixed worker messages being forwarded to the server, allowing
e.g. the screen lock to be bypassed
* WebAPI: improve logging & dump debug info on SIGUSR1
* Add crash handler to print backtraces
* Improve reliability of DBus connections

* Eliminate various irrelevant warning and error messages when
environments (e.g. inside Docker container)