[dovecot/core] 7a3b52: doveadm sync: Don't allow -R parameter.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 7a3b52b8f9c6261ea912d9c96b20d815f782be5b
      https://github.com/dovecot/core/commit/7a3b52b8f9c6261ea912d9c96b20d815f782be5b
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-03-16 (Wed, 16 Mar 2016)

  Changed paths:
    M src/doveadm/doveadm-dsync.c

  Log Message:
  -----------
  doveadm sync: Don't allow -R parameter.

-R implicitly enabled doveadm backup mode, which wasn't supposed to happen.