[PATCH] fast streams support in include_path

Hi, Here's the last attempt at streams support in include_path. After siccing callgrind on the patch, I'm confident it meets performance requirements. Even in the worst case, it is significantly faster than PHP 5.2, and insignificantly slower (1%) than the current CVS. This patch is optimized so that it is: 1% faster than the current implementation for include/require 1% slower than current include_once/require_once implementation It also fixes a compile warning caused by missing cast from const char * to char * Greg