add a special Provides: to all login manager packages

[Rahul Sundaram]

Kevin Fenzi wrote:

> Just as a side note, yes, Xfce does support this with the thunar-volman
> plugin. You can tell it what to do with any number of removable devices
> (mount, copy pictures with gphoto2, etc). 
> 
> Yes, we need ConsoleKit support to work. 
> :)

Xfce-volman IIRC is just a fork of gnome-volume-manager that we had 
until a release ago when Nautilus gained that functionality and g-v-m 
was obsoleted. So if ConsoleKit support is needed, that software is a 
obvious place to look for patches.

Rahul