NAT Network Topology

[Amygos]

Scenarios:

• [x] Proxy support
• [x] NethVoice support
• [x] NS8 admin UI

PRs:

• https://github.com/nethesis/ns8-nethvoice-proxy/pull/24
• https://github.com/nethesis/ns8-nethvoice/pull/188
• https://github.com/nethesis/nethvoice-wizard-restapi/pull/230
• https://github.com/nethesis/ns8-nethvoice-proxy/pull/26
• https://github.com/nethesis/ns8-nethvoice-proxy/pull/27
• https://github.com/nethesis/ns8-nethvoice-proxy/pull/28

Refs:

• https://rtpengine.readthedocs.io/en/latest/rtpengine.html#interfaces
• https://github.com/nethesis/ns8-nethvoice-proxy/blob/10101b6a6606376b1a571aa7b720938d68d21420/modules/rtpengine/files/rtpengine.conf.template#L4
• https://github.com/nethesis/ns8-nethvoice-proxy/blob/10101b6a6606376b1a571aa7b720938d68d21420/modules/kamailio/config/kamailio.cfg#L182
• https://github.com/nethesis/ns8-nethvoice-proxy/blob/10101b6a6606376b1a571aa7b720938d68d21420/imageroot/actions/configure-module/20configure#L19