historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a
pre-PEP8 code, to use the same coding style as in Twisted.
However, snake_case is more readable and it's better to follow PEP8 best practices, so it
has been decided to move on full snake_case. Because Libervia has a huge codebase, this
ended with a ugly mix of camelCase and snake_case.
To fix that, this patch does a big refactoring by renaming every function and method
(including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case.
This is a massive change, and may result in some bugs.
When requesting disco info on a bare jid which is not in our roster, server may return
"Service Unavailable" (to avoid leaking valid JIDs). In this case, the initiation was
failing, this is now fixed by using empty categories in this case.
Jingle Message Initiation is currently not useful for components, and the message workflow
is different in Libervia between clients and components (as a result, `messageReceived`
trigger is never called, and the session proposal is never answered).
This plugin uses the new `XEP-0166_initiate` trigger to initiate a Jingle session with
messages if the peer jid has no resource specified.
On reception, if the sender is not in our roster, a confirmation is requested to user to
avoid leaking presence and IP. If user refuses the session for somebody not in roster,
nothing is sent at all (the request is just ignored).
