Add missing false return type in openssl_x509_parse documentation

Author: cedric-anne

reference/openssl/functions/openssl-x509-parse.xml

@@ -50,6 +50,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
+   Returns an array containing the certificate information, &return.falseforfailure;.
    <emphasis>The structure of the returned data is (deliberately) not
    yet documented, as it is still subject to change.</emphasis>
   </para>