gtk+ dependency on Avahi

[Marek Kasik <mkasik redhat com>]

Hi,

I just want to note here that I've committed fix for showing of printers
advertised by CUPS over Avahi. This is needed since CUPS 1.6 because
CUPS 1.6 removed code for listing of printers advertised by remote CUPS
servers.
This needs dependency on Avahi (see
https://bugzilla.gnome.org/show_bug.cgi?id=688956).
I've filled bug for JHBuild for this (see
https://bugzilla.gnome.org/show_bug.cgi?id=695127).

Regards

Marek