Use single process for now since Hyperkitty can't handle procesess.

web/mailman-web/uwsgi.ini

@@ -14,7 +14,8 @@ wsgi-file = wsgi.py
 
 # Setup default number of processes and threads per process.
 master = true
-processes = 4
+processes = 1
+threads = 2
 
 # Drop privielges and don't run as root.
 uid = mailman