[7/8] server: Implement waiting for job objects.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=12521

Your paranoid android.


=== w7u (32 bit process) ===
process.c:2552: Test failed: WaitForSingleObject returned 258