Add support for Srp256 (and possibly the other hashes (224, 384 and 512) as well).
We should consider to move
back to Jaybird 4, to introduce a property to specify the authentication plugins to be used. That way we can minimize the number of plugins (eg only Srp256, or Srp256 + Srp), while allowing people to apply alternative combinations (eg Legacy_Auth, or Srp224, Srp384 or Srp512, etc).
Note the scope of this story is only adding support for the other protocols, and adding Srp256 to the default. Minimizing the default (eg to only Srp256) is explicitly out of scope for this ticket, and should only be done after