Disable logging of unknown hosts

src/pretix/settings.py

@@ -551,7 +551,10 @@ LOGGING = {
             'level': 'ERROR',
             'class': 'django.utils.log.AdminEmailHandler',
             'filters': ['require_admin_enabled']
-        }
+        },
+        'null': {
+            'class': 'logging.NullHandler',
+        },
     },
     'loggers': {
         '': {
@@ -574,6 +577,10 @@ LOGGING = {
             'level': loglevel,
             'propagate': True,
         },
+        'django.security.DisallowedHost': {
+            'handlers': ['null'],
+            'propagate': False,
+        },
         'django.db.backends': {
             'handlers': ['file', 'console'],
             'level': 'INFO',  # Do not output all the queries