Autodetect when logs should be reopen

roles/mailman/files/hyperkitty.logrotate.conf

@@ -1,10 +1,6 @@
 /var/log/hyperkitty/*.log {
     missingok
     notifempty
-    sharedscripts
     delaycompress
     su root apache
-    postrotate
-        /sbin/service httpd reload > /dev/null 2>/dev/null || true
-    endscript
 }

roles/mailman/templates/settings.py.j2

@@ -262,7 +262,7 @@ LOGGING = {
         'file':{
             'level': 'INFO',
             #'class': 'logging.handlers.RotatingFileHandler',
-            'class': 'logging.FileHandler',
+            'class': 'logging.handlers.WatchedFileHandler',
             'filename': '/var/log/hyperkitty/hyperkitty.log',
             'formatter': 'verbose',
         },