Allow logging targets to be configured to receive minio (#8347)

specific errors, `application` errors or `all` by default.

console logging on server by default lists all logs -
enhance admin console API to accept `type` as query parameter to
subscribe to application/minio logs.

docs/config/config.sample.json

@@ -186,6 +186,7 @@
 		"http": {
 			"target1": {
 				"enabled": false,
+				"type": "minio",
 				"endpoint": "https://username:password@example.com/api"
 			}
 		}