[OpenSIPS-Devel] [OpenSIPS/opensips] e472e5: Update the help messge.

[Bogdan-Andrei Iancu]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: e472e528685d09f065bf0712838878ad1a1d5c72
      https://github.com/OpenSIPS/opensips/commit/e472e528685d09f065bf0712838878ad1a1d5c72
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2018-02-27 (Tue, 27 Feb 2018)

  Changed paths:
    M help_msg.h

  Log Message:
  -----------
  Update the help messge.

'-D' is not "do not fork" anymore, but enbles the "debug mode"
Reported in #1295