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
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Merge branch 'V8_2_2-branch' into V8_2-branch
Merge branch 'V8_2-branch' into V8_3_0-branch
Merge branch 'V8_3_0-branch'
turn off USE_SHARED_PORT by default, still too many tests failing with it on.
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