Make it possible to opt out of statistics

core/admin/mailu/__init__.py

@@ -41,7 +41,8 @@ default_config = {
     'PASSWORD_SCHEME': 'SHA512-CRYPT',
     'WEBMAIL': 'none',
     'AUTH_RATELIMIT': '10/minute;1000/hour',
-    'RATELIMIT_STORAGE_URL': 'redis://redis'
+    'RATELIMIT_STORAGE_URL': 'redis://redis',
+    'DISABLE_STATISTICS': 'False'
 }
 
 # Load configuration from the environment if available
@@ -62,6 +63,7 @@ else:
     instance_id = str(uuid.uuid4())
     with open(app.config["INSTANCE_ID_PATH"], "w") as handle:
         handle.write(instance_id)
+if app.config["DISABLE_STATISTICS"].lower() != "true":
     try:
         socket.gethostbyname(app.config["STATS_ENDPOINT"].format(instance_id))
     except:

docs/compose/.env.dist

@@ -36,6 +36,9 @@ TLS_FLAVOR=cert
 # Authentication rate limit (per source IP address)
 AUTH_RATELIMIT=10/minute;1000/hour
 
+# Opt-out of statistics, replace with "True" to opt out
+DISABLE_STATISTICS=False
+
 ###################################
 # Optional features
 ###################################