Client hangs using -P option

[Derek V. <dvi...@sa...>]

This has been reported before, but there didn't seem to be any
resolution to it.

I'm testing iperf (1.7.0) on a RH9 box and the process executes
correctly but the threads do not join on exit and it hangs.  I've tested
this on FC2 (w/2.6 kernel) and there seems to be no problem there.  I
have not tested it on other platforms.

There seems to be no problem with 1 or 2 threads.  When I get above 3,
then the hang occurs.  I've instrumented the code with some printf's and
the Notify::ThreadFinished() method exits for the final client thread
successfully.

The Speaker::AllThreadsDone() does not return at the bottom of
Speaker::Run().

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