buildbot status

[Dan Kegel]

- stability problems
The buildbot cluster is not ready for prime time yet.
My ubuntu 11.04-based slaves tend
to lock up within a day with either an OOM failure, an X livelock, or
something else.  So I brought an ubuntu 10.04.3 slave online and
moved the buildmaster off onto its own machine;
let's see what breaks next.

- Slave speed
Here is the complete build-and-test time (and the build time alone)
for four CPUs:
54 (48)  celeron @ 2.80 GHz (headless, so it's not running all tests)
17 (10)  E8400 @ 3.00GHz
14 (6)   Q9300 @ 2.50GHz
12 (4)   i7 920 @ 2.67GHz

I will probably stick with slaves that are core 2 duo or better,
so patches can get fast feedback.