Adieu register_globals

Hello, As discussed last year, register_globals will be removed in php6. This patch is the first step: http://pear.php.net/~pierre/remove_register_globals.txt The only thing I find confusing is a comment in main/php_variables.c php_autoglobal_merge. The comment says something and the tests something else (register_globals AND instead of register_globals OR). I will review all the affected tests if you consider this patch ok to be commited. Some will be updated, other simply removed. I did not run benchmarks, but I feel like it speeds up php a bit :) Comments and feedbacks welcome, --Pierre