[Python-Dev] Backport threading.py fix to 2.5.2?

[Guido van Rossum]

See http://bugs.python.org/issue1731. Should we consider it safe to
backport r57216 to 2.5.2? This is Thomas Wouters's code to disable
spurious tracebacks when daemon threads die. We're running some 2.4
apps with (a variant of) this at Google that get many 1000s of
invocations a day, so I'm pretty confident that it works.

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--Guido van Rossum (home page: http://www.python.org/~guido/)