Rotation of shared daemon log can result in writing to old file #3106

When a daemon forks off a helper process on unix, the child process now
reopens the log file on every write and doesn't perform log rotation.
This fixes a bug where both parent and child will rotate the log, and
one ends up continuing to write to the rotated file.
Fix typo preventing build of manual.  (Why don't we do this automagically anymore?)
Merge branch 'V8_2-branch'
Merge branch 'master' of ssh://ingwe.cs.wisc.edu/p/condor/repository/CONDOR_SRC