[PATCH] Parse "-d / --define" for php-cgi / php-fastcgi

Hello, please find attached a tiny patch to parse "-d" and "--define" command line arguments for fastcgi/cgi sapi. This allows overriding php.ini defaults in a very convient way in the wrapper script that gets usually used (at least in a fastcgi/suexec setup). The patch is against PHP_5_1, because AFAICS this functionality is already in HEAD?! Because 5.1.3 is about to get released, I don't think it gets added for it, but please consider it for the 5.2 branch. Thank you.