[dovecot/core] f5870a: welcome: Fix sending parameters to welcome script.

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: f5870a09bc1ca6561a094d1a2df0fb40197ced49
      https://github.com/dovecot/core/commit/f5870a09bc1ca6561a094d1a2df0fb40197ced49
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2017-06-13 (Tue, 13 Jun 2017)

  Changed paths:
    M src/plugins/welcome/welcome-plugin.c

  Log Message:
  -----------
  welcome: Fix sending parameters to welcome script.

Broken by f38b0dafbffa9d79542e36b4b3e598ed4115e5a3