[Libvir] [PATCH][RFC] shows scheduler information

Hi, This patch intends add a showing function of scheduler information. If apply this patch to current revision 1.490 and type virsh dominfo 0 then shows following scheduler information. Currently I assume credit scheduler only. getting function is implemented but setting function is not yet. I just waiting for comments. Id: 0 Name: Domain-0 UUID: 00000000-0000-0000-0000-000000000000 OS Type: linux State: running CPU(s): 1 CPU time: 432.7s Max memory: no limit Used memory: 1933312 kB scheduler info 5 256 0 SchedulerID: 5 Weight: 256 Cap: 0 Thanks Atsushi SAKAI