mod_pubsub_subscription: support subscribing from a bare JID Allow subscribing from a bare JID on the component instead of only the component host, useful for subscribing to whitelist access model nodes that want to see a particular JID in the from.

This module produces more detailed HTTP logs for Prosodys built-in HTTP
server. The format is similar to that of Apache and go into Prosodys
normal logs at the `info` level.