Fixed #673: Request data is not cleaned for variables affected by register_argc_argv or register_long_arrays
Fixed #674: Copies of $_SERVER values in $_ENV are not cleaned
Fixed #679: $HTTP_RAW_POST_DATA is not removed on request startup
Fixed #681: WebRouting does not clean up in $_REQUEST
merge 0ce7c759c5882ffae5ac1312437527b630e373a9