Re: add a special Provides: to all login manager packages

[Bill Nottingham <notting redhat com>]

Chris Lumens (clumens redhat com) said: 
> 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.

As a corollary, something that would allow /etc/X11/prefdm to not always
be hand-edited for new options would be nice as well.

Bill