MTProxy cannot bind to localhost (127.0.0.1)

[eumox]

Thank you for maintaining this project!

MTProxy is running behind a reverse TCP proxy. When started with the "--address 127.0.0.1" option, MTProxy logs the following error: Bad binded IP address 127.0.0.1, search in ifconfig.

[dvershinin]

Fixed in #33. The issue was twofold:

1. The IP validation only accepted 10.0.0.0/8 — now it also accepts 127.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16
2. Outgoing connections to Telegram DCs were being bound to the configured address, which breaks routing when using loopback — now skipped for 127.x.x.x

Please try the latest master once the PR is merged and let us know if it works for your reverse proxy setup.