minor fixes in order to run makemessages

admin/forms.py

@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 from django import forms
 from modoboa.admin.models import *
 from django.utils.translation import ugettext as _

admin/models.py

@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 from django.db import models, IntegrityError
 from django.contrib.auth.models import User
 from django.utils.translation import ugettext as _

admin/permissions.py

@@ -1,4 +1,4 @@
-# coding: utf8
+# coding: utf-8
 
 from django.utils.translation import ugettext as _
 from django.contrib.auth.models import User, Group

lib/imap_utf7.py

@@ -1,4 +1,4 @@
-# -*- coding: latin-1 -*-
+# -*- coding: iso-8859-1 -*-
 
 """
 Imap folder names are encoded using a special version of utf-7 as defined in RFC