* Tweak AS registration check
* Check appservice usernames using correct function
* Update sytest-whitelist
* Use gomatrixserverlib.Client since that allows us to disable TLS validation using the config
* Add appservice-specific client and ability to control TLS validation for appservices only
* Set timeout on appservice client
* Review comments
* Remove dead code
* Enforce LoginTypeApplicationService after all
* Check correct auth type field