Minor grammatical fixes to #3339
Remove API chapter's HTCondor GAHP subsection, which was empty for
years.
===GT=== #2433
Remove ancient history Linux info about old kernels and keyboard
activity detection.
===GT=== #2433
Fix up reference to the moved FAQ section
Fix prose that refer to the nonexistent FAQ; refer to appropriate wiki.
===GT=== #2433
Merge branch 'V8_0-branch' of /p/condor/repository/CONDOR_SRC into V8_0-branch

Conflicts:
	doc/user-man/vm.tex
Merge branch 'V8_0-branch' into V8_1_1-branch