[ConsoleKit] multi-seat branch recent changes

[Halton Huo]

On Thu, 2009-08-06 at 09:30 -0400, Ray Strode wrote:
> This won't do the right thing.   strcmp and strverscmp aren't
> compatible.
> 
> Take for instance the strings 2foo, 3foo, 20foo,
> 
> strcmp will sort that 2foo, 20foo, 3foo and strverscmp will sort it
> 2foo, 3foo, 20foo
> 
> which is what we want.  If you don't have strverscmp, we'll probably
> need to write our own...

Yes, I will work out the strverscmp self implementation later.

I've committed two changes today. One is ck-seat-tool for add/remove
sessions. The other one is for ck-list-sessions --formats enhancement.
Would you please try it out?

Now I'm trying to add display-type property for CkSession which allows
'ck-list-sessions -f session-id,display-type'. It is useful especially
for Sunray.

Thanks,
Halton.