Mark DOMNode textContent as readonly.

DOMNode textContent should be documented as read-only, although other implementations of the DOM such as JavaScript allow direct setting of the textContent of an Element to insert plain text without escaping. In PHP, setting the textContent is a no-op.

-- 
Provided by anonymous #17363 (andybkk@hotmail.co.uk)

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@326126 c90b9560-bf6c-de11-be94-00142212c4b1

reference/dom/domnode.xml

@@ -123,6 +123,7 @@
     </fieldsynopsis>
     <fieldsynopsis>
      <modifier>public</modifier>
+     <modifier>readonly</modifier>
      <type>string</type>
      <varname linkend="domnode.props.textcontent">textContent</varname>
     </fieldsynopsis>