thunderbird-bin: update to version 24.6.0
gvfs: add more supported protocols in gnome 3.10. Closes #2880

This change has been successfully tested on gnome 3.12 (thanks
@lethalman!). Now bring it to gnome 3.10, which currently is the default
gnome3 version in NixOS.

I've build and run tested it (success: smb:// protocol now work in
Nautilus).