MUC: Simplify creation of <{muc}x> for room creation
It’s only sent to the creator so no need to have separate variants for
different kinds of participants.
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