openssl constants.xml diff for php docs

--- en/reference/openssl/constants.xml
+++ en/reference/openssl/constants.xml
@@ -377,7 +377,7 @@
      </term>
      <listitem>
       <simpara>
-
+       Disabled in PHP 5.3.2 and PHP 5.2.13 when md2 support was disabled in OpenSSL >=1.0.0.
       </simpara>
      </listitem>
     </varlistentry>