Since Prosody no longer ships with a default global `ssl` section, TLS ports like for HTTPS no longer work by default.
Likely solved by implementing SNI #409 and loading *all* the certs.
FWIW the workaround here is usually:
https_certificate = "/path/to/www.example.com.crt"
Let's say this depends on SNI and better HTTP VirtualHost support.
Fixed for HTTPS in https://hg.prosody.im/trunk/rev/fa35724dbdba
Everything else, let's fix via SNI #409.