Support multiple devices at same IP address and port number

This is useful when using Bubble Upnp server to expose Chromecast devices as OpenHome or AVTransport UPNP/DLNA players.

See issue #157, and the Changelog.

Debian Bookworm appimages in assets.
Debian Bullseye (Ubuntu 20.04) appimages in assets.

Windows setup, and debug/release binaries in assets.