util.startup: Ensure import() is available in prosodyctl (thanks keyzer)
Fixes error in mod_authz_internal due to import() being unavailable as
it was only loaded in Prosody proper
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