Merge branch 'PHP-8.0'

* PHP-8.0:
  Make getElementsByTagNameNS $namespace nullable

diff --cc ext/dom/document.c
Simple merge

diff --cc ext/dom/element.c
Simple merge

diff --cc ext/dom/php_dom.stub.php
Simple merge

diff --cc ext/dom/php_dom_arginfo.h
index 067b9b0b91b2751536bb5e94563ca05ca7bdd982,22944d296ca936877c4f3d9ab994a9bb6c6aa66c..53f3e98624531d9ff52610e3c562c92e4df374c5
--- 1/ext/dom/php_dom_arginfo.h
--- 2/ext/dom/php_dom_arginfo.h
+++ b/ext/dom/php_dom_arginfo.h
@@@ -1,5 -1,5 +1,5 @@@
  /* This is a generated file, edit the .stub.php file instead.
-  * Stub hash: 550deb4b432eb0572b30c220998504047fc556f5 */
 - * Stub hash: 72c2add8db9af8f90e84997a2a5ca6743268fae8 */
++ * Stub hash: 5d6877f7b7474a39a710ffde69122cd029663f26 */
  
  ZEND_BEGIN_ARG_WITH_RETURN_OBJ_INFO_EX(arginfo_dom_import_simplexml, 0, 1, DOMElement, 1)
        ZEND_ARG_TYPE_INFO(0, node, IS_OBJECT, 0)