Improve default sql.conf 2

BlueMapCommon/src/main/resources/de/bluecolored/bluemap/config/storages/sql.conf

@@ -14,7 +14,7 @@ storage-type: SQL
 connection-url: "jdbc:mysql://localhost:3306/bluemap?permitMysqlScheme"
 
 # You can set any additional (JDBC-Driver-specific) properties here
-# (if you have user/password in your connection-url, you don't need them here, and vice versa)
+# Usually thats your db-user and password
 connection-properties: {
     user: "root",
     password: ""