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.
- `sat` and `self.__sat` have been renamed to `host` and `self.host` for consistency with
other plugins.
- `gpg_provider` is set in client while profile is connecting, so the instance is easily
accessible to plugins depending on XEP-0373
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public keys were only obtained from PEP notifications, however this wasn't working if the
entity was not in our roster.
Now if no public key is retrieved from local storage, the public key node is requested,
and an error is raised if nothing is found. This allows the use of OX with entities which
are not in roster.
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