Implement Persona authentication support

[Kissaki]

Please implement persona authentication support.
https://persona.org/

Rather than having to register with, manage and remember yet another username password combination users would be able to authenticate with the Mozilla created/hosted Persona service (or optionally custom providers).

[shadow82x]

The chances of this getting implemented are highly unlikely. The development team is against using any third party authentication support due to the rapid changing code changes they often require. Doesn't mean something like this couldn't be turned into a mod though.