[Users] ADDON: new nathelper parameter

[Bogdan-Andrei Iancu]

Hi everybody,

Thanks to a contribution from Jeremie, nathelper module offers the 
possibility to configure the "a=nortpproxy:yes\r\n" string. This is a 
string marker added by nathelper when rtpproxy is enabled.

The new "nortpproxy_str" parameter:
    http://www.openser.org/docs/modules/1.2.x/nathelper.html#AEN217

allows you to both change or disable this string marker.

For more see:
    http://openser.org/pipermail/users/2006-September/006519.html

regards,
Bogdan