local-metadata: Support all GIO supported schemes
local-metadata: Support all GIO supported schemes

And not just file:///

https://bugzilla.gnome.org/show_bug.cgi?id=673916

kyoushuu/grilo-plugins,kyoushuu/grilo-plugins,MathieuDuponchelle/grilo-plugins,grilofw/grilo-plugins,jasuarez/grilo-plugins,vrutkovs/grilo-plugins,vrutkovs/grilo-plugins,vrutkovs/grilo-plugins,GNOME/grilo-plugins,GNOME/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,MikePetullo/grilo-plugins,vrutkovs/grilo-plugins,grilofw/grilo-plugins,jasuarez/grilo-plugins,kyoushuu/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,MathieuDuponchelle/grilo-plugins