Hey Jens, thanks for posting about this! I am working on getting Fedora updated for GUPnP 1.6, and have now built gssdp, gupnp, rygel and gupnp-tools. I was looking into gupnp-igd, and found that you already did the porting work there, and there is just a couple of minor nits to fix before that look ready for a release which builds against 1.6.
I looked a little into dleyna-server and dleyna-renderer, and found that the original Github repositories are unmaintained, but that you have taken on maintenance and released a combined package. That looks like something that distributions should be using instead of the Intel repos on Github. Should I then be retiring the old and unmaintained split dleyna packages, and using your new combined dleyna project instead? I do not follow gupnp and dleyna development closely, so and insight would be appreciated. Thanks!
GUPnP-IGD is usally handled by @ocrete (shameless ping).
Regarding dLeyna: Yes, please use the dLeyna from GNOME/World. I am not really happy of having to care for dLeyna, yet here I am (btw, I think I filed an issue with Fedora to upgrade dLeyna, not sure if you have seen that)