Fixed threadpool hang and added lots of smoketests.
* Fixed bug in threadpool logic when calling CleanupAnyWorkersSharingAllocator - this was deleting the worker's thread death notifier in the context of a worker thread (which is only allowed from the context of the main thread).
* Added lots more smoketests
* Added --overwrite option to fzip (previously unzipping would always overwrite)
THE MAIN PCRE LIBRARY
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Written by: Philip Hazel
Email local part: ph10
Email domain: cam.ac.uk
University of Cambridge Computing Service,
Cambridge, England.
Copyright (c) 1997-2008 University of Cambridge
All rights reserved
THE C++ WRAPPER LIBRARY
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Written by: Google Inc.
Copyright (c) 2007-2008 Google Inc
All rights reserved
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