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On Windows 2000, at least, when a collision occurs
there is a significant (30%?) chance that the late
arrival will get a listening connection.  Then both
sets of processes merrily communicate on the same
socket, apparently w/o mutual corruption.  At least
that's the way it seemed to me last time I looked.
I can't put much faith in a situation like that.

However, your patch 1529142, though a hack, may be
practical, at least for now.  2.6.