Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
  disabled functions must not have return type
  Restore the execute bit for run-tests.php

Author: krakjoe

Zend/zend_API.c

@@ -2781,7 +2781,7 @@ ZEND_API int zend_disable_function(char *function_name, size_t function_name_len
 	}
 
 	if ((func = zend_hash_str_find_ptr(CG(function_table), function_name, function_name_length))) {
-	    func->fn_flags &= ~(ZEND_ACC_VARIADIC | ZEND_ACC_HAS_TYPE_HINTS);
+	    func->fn_flags &= ~(ZEND_ACC_VARIADIC | ZEND_ACC_HAS_TYPE_HINTS | ZEND_ACC_HAS_RETURN_TYPE);
 		func->num_args = 0;
 		func->arg_info = NULL;
 		func->handler = ZEND_FN(display_disabled_function);