core: Don't keep strong reference on HTTP server
core: Don't keep strong reference on HTTP server

The http item uri doesn't need a strong reference on the HTTP server,
the part of its lifetime where it needs access to that is considerably
smaller than the lifetime of the HTTP server and it blocks disposing
the HTTP server when the GUPnPContext becomes unavailable.

Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,Tarnyko/rygel,GNOME/rygel,jku/rygel,GNOME/rygel,Tarnyko/rygel