Re: [sr-dev] [kamailio/kamailio] Lost selectors (#2705)

I am glad that the function of the `lost` module is extended. Just a small note: - according to the latest version of NENA i3, the Call-Info header purpose changes from nena-xxx to emergency-xxx (e.g. nena-IncidentId will be replaced by emergency-IncidentId); perhaps this can already be taken into account. - do we need a new release every time new selectors are needed? For instance in Europe we can have `purpose=EmergencyCallData.eCall.MSD` when NG eCall is rolled out. Refer to [RFC 8147](https://tools.ietf.org/html/rfc8147)