Don't try to ramp up TCP send buffer sizes #4489

This fails in odd ways on new kernels.  Just try to
set it to the requested value.
add comments for FLOCK_TO and FLOCK_FROM to condor_config.generic #4404
these macros provide a way to customize use SECURITY : HOST_BASED
===VersionHistory:None===
Merge branch 'V8_2_2-branch' into V8_2-branch
Merge branch 'V8_2-branch' into V8_3_0-branch