[PATCH] unregister_shutdown_function()

Hi, This patch implements unregister_shutdown_function(), which removes a function already registered with register_shutdown_function(). It resolves request #53702 (according to google, not sure if it's still active) and I've thought it a curious absence for a while. The patch (against trunk) is at: http://spellign.com/patches/php-trunk-unregister_shutdown_function.patch N.B. I don't return from the apply func with ZEND_HASH_APPLY_STOP when it matches because it's also possible to register the same function twice (maybe a bug?) Regards, Arpad