Gtk+ freeze break request

[Marek Kasik <mkasik redhat com>]

Bug 674264 - Credentials from gnome-keyring is not used while printing
 - https://bugzilla.gnome.org/show_bug.cgi?id=674264

Andre Heinecke prepared a patch which adds ability to store passwords
using Secret service when printing to samba printers.

> From the UI point of view, the patch adds a check box "Remember
password" to the password dialog if the service is available.

I've been testing and reviewing the code for quite a long time and I
think that it is ready to be pushed to Gtk+.

Regards

Marek