Merge with nolan

net.httpserver: Don't upset logger when response is nil

Log stanza if stanza.to isn't set for some component errors.

mod_console: Reload/unload a module on a component host if it is loaded there

Automated merge with http://waqas.ath.cx:8000/

util.stanza: Serializer optimizations, and nicer output for empty elements

mod_pep: Broadcast only to available recipients with caps

mod_pep: Ignore presence subscriptions when extractng hash information

mod_pep: Added function get_caps_hash_from_presence

util.muc: Fixed duplicate parameter names in function room:set_subject

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