core.portmanager: Don't set the first TLS context with a cert as main context
Don't think this works and it's apparently acceptable to require SNI these days.
For full information on our dependencies, version requirements, and
where to find them, see https://prosody.im/doc/depends
If you have luarocks available on your platform, install the following:
- luaexpat
- luasocket
- luafilesystem
- luasec