Redirect requests for agenda.txt to the static version, as discussed

on today's call.  Relates to #130
 - Legacy-Id: 633

ietf/meeting/views.py

@@ -3,7 +3,7 @@
 from django.shortcuts import render_to_response as render, get_object_or_404
 from ietf.proceedings.models import Meeting, MeetingTime, WgMeetingSession, NonSession, MeetingVenue, IESGHistory, Proceeding, Switches
 from django.views.generic.list_detail import object_list
-from django.http import Http404
+from django.http import HttpResponsePermanentRedirect, Http404
 from  django.db.models import Q
 import datetime
 
@@ -33,6 +33,8 @@ def show_html_materials(request, meeting_num=None):
     return object_list(request,queryset=queryset_list, template_name="meeting/list.html",allow_empty=True, extra_context={'meeting_num':meeting_num,'irtf_list':queryset_irtf, 'interim_list':queryset_interim, 'training_list':queryset_training, 'begin_date':begin_date, 'cut_off_date':cut_off_date, 'cor_cut_off_date':cor_cut_off_date,'sub_began':sub_began})
 
 def show_html_agenda(request, meeting_num=None, html_or_txt=None):
+    if html_or_txt == 'txt':
+        return HttpResponsePermanentRedirect('http://www.ietf.org/meetings/agenda_%d.txt' % int(meeting_num))
     queryset_list=MeetingTime.objects.filter(meeting=meeting_num).exclude(day_id=0).order_by("day_id","time_desc")
     meeting_info=get_object_or_404(Meeting, meeting_num=meeting_num)
     nonsession_info=NonSession.objects.filter(meeting=meeting_num,day_id__gte='0').order_by("day_id")