david 9b28395cd8 Don't allow matching probes that haven't been sent. ...

This is a reversion of r26232 and r26230, which were themselves
reversions of r26201 and r26202 respectively, in
https://svn.nmap.org/nmap-exp/luis/nmap-os6@26232.

This code has gone back and forth a few times. Looking at it again, I
still think this way is more correct. At any rate, the other way
demonstrably leads to rare assertion failures (which are protecting
against a nonsensical subtraction with an all-zero timeval).

2012-03-22 01:30:47 +00:00

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