[OpenSIPS-Devel] [OpenSIPS/opensips] 0b3419: Fix doc formating and improve some description

[Bogdan-Andrei Iancu]

  Branch: refs/heads/2.2
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 0b3419f529ac222ad7aba1fede06b0abfeb0c076
      https://github.com/OpenSIPS/opensips/commit/0b3419f529ac222ad7aba1fede06b0abfeb0c076
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2017-05-11 (Thu, 11 May 2017)

  Changed paths:
    M modules/nathelper/README
    M modules/nathelper/doc/nathelper_admin.xml

  Log Message:
  -----------
  Fix doc formating and improve some description

(cherry picked from commit aa2f0f5f2bd304e3f4923aca358bdacc70065e15)