Print list of supported channels
Print list of supported channels

https://bugzilla.redhat.com/show_bug.cgi?id=834513

Fantu/spice-gtk,Fantu/spice-gtk,elmarco/spice-gtk,elmarco/spice-gtk,mathslinux/spice-gtk,guodong/spice-gtk,mathslinux/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,fgouget/spice-gtk,fgouget/spice-gtk,elmarco/spice-gtk,SPICE/spice-gtk,Fantu/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,guodong/spice-gtk,mathslinux/spice-gtk,guodong/spice-gtk,flexVDI/spice-gtk,guodong/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk,SPICE/spice-gtk,fgouget/spice-gtk,SPICE/spice-gtk,SPICE/spice-gtk,mathslinux/spice-gtk,Fantu/spice-gtk,flexVDI/spice-gtk