[patch] avoiding TSRMLS_FETCH (custom sorting functions)

Hey, Attached is a patch which replaces the use of libc's quicksort and uses our own custom quicksort for quicksort sorting, giving the immediate benefit of allowing us to pass TSRMLS_CC to the callbacks, and avoid a TSRMLS_FETCH(). The patch also applies the changes to our mergesort implementation. I've put the function in a seperate file in Zend, zend_qsort.c (instead of as a file in php4/main) for two reasons: 1) qsort() is used by Zend 2) its a fairly common function, and re-implemented in order to play nice with Zend's TS mechanism, this should be made available to all programs using Zend. Comments are appreciated and welcome... I'll commit after an appropriate mourning period if no one speaks up. -Sterling