Add libxml constants for PHP 8.4 (#3900)

Author: nielsdos

reference/libxml/constants.xml

@@ -226,6 +226,22 @@
     </note>
    </listitem>
   </varlistentry>
+  <varlistentry xml:id="constant.libxml-no-xxe">
+   <term>
+    <constant>LIBXML_NO_XXE</constant>
+    (<type>int</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Disables XML External Entities (XXE) when performing entity substitution
+    </simpara>
+    <note>
+     <para>
+      Only available in Libxml &gt;= 2.13.0, as of PHP 8.4.0
+     </para>
+    </note>
+   </listitem>
+  </varlistentry>
   <varlistentry xml:id="constant.libxml-nsclean">
    <term>
     <constant>LIBXML_NSCLEAN</constant>
@@ -271,6 +287,22 @@
     </note>
    </listitem>
   </varlistentry>
+  <varlistentry xml:id="constant.libxml-recover">
+   <term>
+    <constant>LIBXML_RECOVER</constant>
+    (<type>int</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Enables recovery mode when parsing a document.
+    </simpara>
+    <note>
+     <para>
+      Only available as of PHP 8.4.0
+     </para>
+    </note>
+   </listitem>
+  </varlistentry>
   <varlistentry xml:id="constant.libxml-xinclude">
    <term>
     <constant>LIBXML_XINCLUDE</constant>