pyca/cryptography — pull request #883 by reaperhulk (2014-04-02 22:20:06+00:00)
Title: move salt_length from MGF1 to PSS and start deprecation cycle

This is the first time we've done this so feedback welcome.

One challenge with our currently stated deprecation cycle is that we'll need to ensure we change the warning from `PendingDeprecationWarning` to `DeprecationWarning` in the fifth release and, of course, remove it in the sixth.