[readme] log level is not longer case sensitive. State limitation of …

…refresh requests.

README.md

@@ -106,11 +106,11 @@ You can configure the most behaviors of *lists updater* via environment variable
 
 | Environment Variable  | Default |Description |
 |-----------------------|---------|------------|
-| BLU_BLOCKY_URL            |       | Enable [refresh request](https://0xerr0r.github.io/blocky/swagger.html#operation--lists-refresh-post) to blocky. It should be the base URL of blocky. Use an empty string to disable refresh requests. |
+| BLU_BLOCKY_URL            |       | Enable [refresh request](https://0xerr0r.github.io/blocky/swagger.html#operation--lists-refresh-post) to blocky. It should be the base URL of blocky. Use an empty string to disable refresh requests. Limitation: the updater will send requests to a single blocky instance today. |
 | BLU_DESTINATION_FOLDER    | /web/downloaded | The location of aggregate lists. This should be under `BLU_WEB_FOLDER` thus blocky can read the files via the static file server. |
 | BLU_INITIAL_DELAY_SECONDS | 0     | Delay in seconds before the first download. |
 | BLU_INTERVAL_SECONDS      | 86400 | Interval between two downloads. Set to 0 disable periodically downloads, then downloads will occur only at *source* changes. |
-| BLU_LOG_LEVEL             | INFO  | Control how many logs generated by Gantry. Valid values are `NONE`, `ERROR`, `WARN`, `INFO`, `DEBUG` (case sensitive). |
+| BLU_LOG_LEVEL             | INFO  | Control how many logs generated by Gantry. Valid values are `NONE`, `ERROR`, `WARN`, `INFO`, `DEBUG`. |
 | BLU_NODE_NAME             |       | Add node name to logs. |
 | BLU_NOTIFICATION_APPRISE_URL |    | Enable notification after each refresh with [apprise](https://github.com/caronc/apprise-api). This must point to the notification endpoint (e.g. `http://apprise:8000/notify`). Use an empty string to disable notification. |
 | BLU_POST_DOWNLOAD_CMD     |       | A command or function running after downloading a list. The first argument will be the path to the downloaded file, i.e. your command will be `eval` as `your_command <file_path>`. The command will apply to all downloaded lists. This can be used to fix problems in the lists before the upstream maintainer fixing it. |