[dovecot/core] 165551: lib-master, login-common: Add dual cert support

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 165551d5733c2f21e25ff1d28c1795d0bf63353f
      https://github.com/dovecot/core/commit/165551d5733c2f21e25ff1d28c1795d0bf63353f
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2017-05-08 (Mon, 08 May 2017)

  Changed paths:
    M src/lib-master/master-service-ssl-settings.c
    M src/lib-master/master-service-ssl-settings.h
    M src/login-common/ssl-proxy-openssl.c

  Log Message:
  -----------
  lib-master,login-common: Add dual cert support

Adds new settings ssl_alt_cert and ssl_alt_key