fix linux hyperthread detection in sysapi #4458
===VersionHistory:Pending===
add -absent to usage #2690
Merge branch 'V8_2-branch'
found 2 more references to PrivSep in the manual.  Gone now.  #4057
Merge branch 'V8_2-branch' of /p/condor/repository/CONDOR_SRC into V8_2-branch
Merge branch 'V8_2-branch'

Conflicts:
	doc/admin-man/group-tracking.tex