mod_http: Simplify conversion of Set to Array
Avoids the _items semi-private value, that is used everywhere for some
reason.
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