Update most URLs to use HTTPS if available, and fix some dead ones too.

data/example.conf

@@ -1192,7 +1192,7 @@ module
 /*
  * db_redis.
  *
- * This module allows using Redis (http://redis.io) as a database backend.
+ * This module allows using Redis (https://redis.io/) as a database backend.
  * This module requires that m_redis is loaded and configured properly.
  *
  * Redis 2.8 supports keyspace notifications which allows Redis to push notifications

data/modules.example.conf

@@ -171,7 +171,7 @@ module { name = "help" }
 	{
 		name = "dnsbl.dronebl.org"
 		time = 4h
-		reason = "You have a host listed in the DroneBL. For more information, visit http://dronebl.org/lookup_branded?ip=%i&network=%N"
+		reason = "You have a host listed in the DroneBL. For more information, visit https://dronebl.org/lookup_branded?ip=%i&network=%N"
 	}
 
 	/* Exempt localhost from DNSBL checks */