When enabled, the websocket implementation will attempt to use two implicit endpoints, using these URLs:
- `wss://[host]:5443/ws`
- `ws://[host]:5443/ws`
These endpoints should include ports that are used by default by known implementations, such as 5280/5281 (Prosody) and 7070/7443 (Openfire).
This also lifts a bunch of logic from smack-websocket-okhttp into
smack-websocket. Furthermore, the following subprojects require now
Java 11:
- smack-integration-test
- smack-omemo-signal-integration-test
- smack-repl
- smack-websocket-java11
Related tracking issue: SMACK-835
This also resulted in a refactoring of the Providers and parsing
Exceptions. NumberFormatException and ParseException can now be thrown
directly, the wrapping in a SmackParsingException is down at a higher
layer, i.e. in AbstractProvider.