fix reliability of timeout kills

fix reliability of timeout kills

The method introduced in commit
6c8a3d3c55997978bacaecc5dbbb7d03c2fee345 to avoid killing
workers after suspend/hibernate interacted badly with the change
for OpenBSD fchmod(2) compatibility introduced with the 0.93.3
release.  This interaction lead to workers with files stuck in
the zero state to never be murdered off for timeout violations.

Additionally, the method to avoid killing processes off was
never completely reliable and has been reworked even if we
entered suspend/hibernate/STOP during client processing.

This regression was discovered during continued development of the
Rainbows! test suite (which we will bring over as it becomes ready).