Merged in part of [7375] from jmh@joelhalpern.com.

Now sending draft update notices to IRSG for IRTF stream drafts.  Fixes issue ietf-tools#1227.
 - Legacy-Id: 7402
Note: SVN reference [7375] has been migrated to Git commit 5f89d9a

Author: levkowetz

ietf/doc/views_draft.py

@@ -230,6 +230,12 @@ def change_stream(request, name):
             old_stream = doc.stream
 
             if new_stream != old_stream:
+                if new_stream and new_stream.slug and new_stream.slug == "irtf":
+                    if not doc.notify:
+                        doc.notify = "irtf@irtf.org"
+                    elif "irtf@irtf.org" not in doc.notify:
+                        doc.notify += ", irtf@irtf.org"
+
                 save_document_in_history(doc)
 
                 doc.stream = new_stream