[dovecot/core] 2c5c29: *-login, imapc: Fix new lib-sasl API usage

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 2c5c293940fd6c7e020e1d58dae77a9d01f9059b
      https://github.com/dovecot/core/commit/2c5c293940fd6c7e020e1d58dae77a9d01f9059b
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-12-23 (Fri, 23 Dec 2016)

  Changed paths:
    M src/imap-login/imap-proxy.c
    M src/lib-imap-client/imapc-connection.c
    M src/pop3-login/pop3-proxy.c

  Log Message:
  -----------
  *-login, imapc: Fix new lib-sasl API usage

Forgot to include these in a669d351502e15802b121e1a0bd83f27d1d95f01