sip_nat.conf is an optional configuration file as are many of the _custom.conf files and does not come standard. You would need to create it if you need it. As far as vmexten, there is a feature request for that. It is normally handled in a phone’s provisioning but we will be reviewing adding it into a sip_general_additional.conf file of some sort.
Philippe Lindheimer - FreePBX Project Lead
http//freepbx.org - IRC #freepbx
maybe they did add something, or maybe you have had it in your config for some time. It’s really a bit historical and it can just as easily be placed in sip_general_custom.conf (or what ever I called the include file).
Philippe Lindheimer - FreePBX Project Lead
http//freepbx.org - IRC #freepbx