implement mail address target editing

- extract common code into managemails.forms.MailAddressFieldMixin
- move code from forms into managemails.models.MailAddress
- implement managemails.models.MailboxManager.unused and unused_or_own
- implement managemails.forms.EditMailAddressForm
- add managemails.views.EditMailAddress
- add URL pattern 'edit_mailaddress' to managemails.urls
- add template managemails/mailaddress_edit.html
- add changelog entry

gnuviechadmin/managemails/urls.py

@@ -12,6 +12,7 @@ from .views import (
     ChangeMailboxPassword,
     CreateMailbox,
     DeleteMailAddress,
+    EditMailAddress,
 )
 
 urlpatterns = patterns(
@@ -22,6 +23,9 @@ urlpatterns = patterns(
         ChangeMailboxPassword.as_view(), name='change_mailbox_password'),
     url(r'^(?P<package>\d+)/mailaddress/(?P<domain>[\w0-9-.]+)/create$',
         AddMailAddress.as_view(), name='add_mailaddress'),
+    url(r'^(?P<package>\d+)/mailaddress/(?P<domain>[\w0-9-.]+)/(?P<pk>\d+)'
+        r'/edit$',
+        EditMailAddress.as_view(), name='edit_mailaddress'),
     url(r'^(?P<package>\d+)/mailaddress/(?P<domain>[\w0-9-.]+)/(?P<pk>\d+)'
         r'/delete$',
         DeleteMailAddress.as_view(), name='delete_mailaddress'),