[RFC] An initial attempt of porting rtpproxy-ng module from your twin project to OpenSIPS.

Hello All!
I've made some preliminary work on porting rtpproxy-ng from Kamailio to OpenSIPS. Unfortunately I'm not certain about my patches' quality and love to get any possible feedback on this. Could anyone please review this and help me merging it into OpenSIPS? Also any testing will be highly appreciated.

Also I'd like to say a big thanks to @rfuchs and his fellow developers from @sipwise for this module!