Index: admin/environment.xml
===================================================================
RCS file: /cvsroot/moodle/moodle/admin/environment.xml,v
retrieving revision 1.24
diff -u -r1.24 environment.xml
--- admin/environment.xml	28 Aug 2007 15:35:48 -0000	1.24
+++ admin/environment.xml	7 Dec 2007 00:01:28 -0000
@@ -117,6 +117,11 @@
           <ON_CHECK message="tokenizerrecommended" />
         </FEEDBACK>
       </PHP_EXTENSION>
+      <PHP_EXTENSION name="xmlrpc" level="optional">
+        <FEEDBACK>
+          <ON_CHECK message="xmlrpcrecommended" />
+        </FEEDBACK>
+      </PHP_EXTENSION>
     </PHP_EXTENSIONS>
   </MOODLE>
   <MOODLE version="1.9">
@@ -229,6 +234,11 @@
           <ON_CHECK message="tokenizerrecommended" />
         </FEEDBACK>
       </PHP_EXTENSION>
+      <PHP_EXTENSION name="xmlrpc" level="optional">
+        <FEEDBACK>
+          <ON_CHECK message="xmlrpcrecommended" />
+        </FEEDBACK>
+      </PHP_EXTENSION>
     </PHP_EXTENSIONS>
     <CUSTOM_CHECKS>
       <CUSTOM_CHECK file="question/upgrade.php" function="question_check_no_rqp_questions" level="optional">
Index: lang/en_utf8/admin.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lang/en_utf8/admin.php,v
retrieving revision 1.168
diff -u -r1.168 admin.php
--- lang/en_utf8/admin.php	3 Dec 2007 06:27:21 -0000	1.168
+++ lang/en_utf8/admin.php	7 Dec 2007 00:01:31 -0000
@@ -682,5 +682,6 @@
 $string['uuupdatetype'] = 'Existing user details';
 $string['validateerror'] = 'This value was not valid:';
 $string['xmlstrictheaders'] = 'XML strict headers';
+$string['xmlrpcrecommended'] = 'Installing the optional PHP XML-RPC extension is required for Moodle Networking functionality.  It is not required unless you plan to use Moodle Networking.';
 
 ?>