add a special Provides: to all login manager packages

[Tom "spot" Callaway]

On 2009-02-17 at 11:07:15 -0500, Chris Lumens <clumens at redhat.com> wrote:
> Anaconda needs to know whether it should set the default runlevel to 3
> or 5.  We do this by determining whether or not a package containing a
> login manager has been installed.  Right now we just have a list of
> packages that contain login managers.  Sometimes, we get bitten by that
> - like when kdm moved to a new package, or now when we have a bug report
> regarding slim (#485789).
> 
> Since hardcoded lists always suck, I'm therefore proposing that all
> packages containing a login manager include a special Provides: that we
> can query on.  Then nobody ever has to come asking for a change again,
> and if package names change, it's fine.

Seems reasonably sane. How about:

Provides: login_manager

(The underscore is intentional, because it should never show up in a
package name.)

~spot