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Thread safety fixes

Thread safety patch. It works now with 'just in time' resource initialization!

Thread safety patch. We're still not quite there but it compiles again, and
more logic has been implemented.

Whatnot:
* updated alloc_persist to use critical sections
* changed extension shutdown to two-phase
* updated dependencies
* PR support (don't remember if there was any really)

We need to initialize the utility values after we initialize the INI file, which in
turn, is after we initialize Zend. Set the utility values separately from Zend's
initialization

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Zend Library