For plain text RFCs, point to www.rfc-editor.org instead of www.ietf.org

 - Legacy-Id: 2042

Author: pasieronen

ietf/templates/idrfc/doc_main_rfc.html

@@ -61,7 +61,7 @@
 
 {% endif %}
 <tr><td>Other versions:</td><td>
-<a href="http://www.ietf.org/rfc/rfc{{doc.rfc_number}}.txt">plain text</a>,
+<a href="http://www.rfc-editor.org/rfc/rfc{{doc.rfc_number}}.txt">plain text</a>,
 <a href="http://www.rfc-editor.org/rfc/pdfrfc/rfc{{doc.rfc_number}}.txt.pdf">pdf</a>,
 <a href="http://tools.ietf.org/html/rfc{{doc.rfc_number}}">html</a>
 </td></tr>