server: Don't allow APCs on objects associated with completion port.

[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=32203

Your paranoid android.


=== w7u (32 bit sock) ===
sock.c:6121: Test failed: Expected event sequence [FD_WRITE(0)], got []
sock.c:6142: Test failed: Expected event sequence [FD_READ(0) FD_CLOSE(0)], got [FD_WRITE(0) FD_CLOSE(10053)]
sock.c:6145: Test failed: Failed to empty buffer: -1 - 10054
sock.c:6146: Test failed: Expected event sequence [FD_READ(0)], got []
sock.c:6149: Test failed: Failed to empty buffer: -1 - 10054