Alaric Senat authored 2 years ago and Jean-Baptiste Kempf committed 2 years ago

This version gives access to `UpnpInit2` for both IPv6 and IPv4.
`UpnpInit` is deprecated since 1.6 and less safe than `UpnpInit2`.

Libupnp 1.8.3 has been out since 2017 and has been widely adopted in
most linux distributions now (available on debian since version 10).
Dropping support for lower versions will allow us to completely remove
`UpnpInit` from the codebase and simplify a lot the netintf selection
code.