[dovecot/core] 9199e3: lib-auth: Minor debug logging improvement.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 9199e32b86d2de2fb7b73b6ec03b5c205b995490
      https://github.com/dovecot/core/commit/9199e32b86d2de2fb7b73b6ec03b5c205b995490
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-10-27 (Thu, 27 Oct 2016)

  Changed paths:
    M src/lib-auth/auth-master.c

  Log Message:
  -----------
  lib-auth: Minor debug logging improvement.

Include "PASS" or "USER" in the prefix to make it clear what the reply is
for.