Add BATCH_GAHP_CHECK_STATUS_ATTEMPTS parameter for INFN jobs. #3533

BATCH_GAHP_CHECK_STATUS_ATTEMPTS allows the INFN job manager to
be resilliant to failures in job status checks.  The configuration
option is an integer describing the number of failed attempts
allowed before putting the job on hold.
Don't assume CONDOR_ADMIN is set.
For Bosco, leave CONDOR_ADMIN unset by default.

For many Bosco users, the default email address won't be valid or will
be an address that's never checked.
Remove unused variables in condor_preen.
Add stderr to held reason for infn job attempts submit failure. #3489
Add a known bug to version history #3573
Merge branch 'V7_9_5-branch'
fix for #3572, daylight savings time causes master to restart on Windows
===VersionHistory:Pending===
version history for #3572
Merge branch 'V7_8-branch'
Edit to 7.8.9 version history item
===GT=== #3572
Merge branch 'V7_8-branch'
minor edit of 7.9.6 version history item for #2573
better logging of new-binary-restart in the master for 7.9 series #3572
===VersionHistory:None===
The -absent flag shows absent ads, not -collector.
edit of known bug version history item in 7.9.5 for #3573
set 7.9.5 release date to Apr 17, and correct a LaTeX label typo.
(#3544) Add processor flags to checkpoint platform and advertised attributes.
(#3544) Add processor flags to checkpoint platform and advertised attributes.
Merge branch 'master' of ssh://ingwe.cs.wisc.edu/p/condor/repository/CONDOR_SRC