[dovecot/core] ba942a: auth: Fix mechanism filter to support `none`

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: ba942a16b03f5b7fc373b6b20dcf97436960639f
      https://github.com/dovecot/core/commit/ba942a16b03f5b7fc373b6b20dcf97436960639f
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2017-04-11 (Tue, 11 Apr 2017)

  Changed paths:
    M src/auth/auth-request.c

  Log Message:
  -----------
  auth: Fix mechanism filter to support `none`

Otherwise credentials lookup can fail. None indicates
that it should match when no mech is specified.


  Commit: 061b11b93cc5b04cc6b3818246bf76f705a7ac4f
      https://github.com/dovecot/core/commit/061b11b93cc5b04cc6b3818246bf76f705a7ac4f
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2017-04-11 (Tue, 11 Apr 2017)

  Changed paths:
    M src/auth/auth-request.c

  Log Message:
  -----------
  auth: Filter passdbs on credentials lookup start

Consistency with how plain verify works.


Compare: https://github.com/dovecot/core/compare/ace06232cfa0...061b11b93cc5