Add redis-like options

```bash
-h <hostname>  Server hostname (default: 127.0.0.1)
-p <port>      Server port (default: 6379)
-a <password>  Password to use when connecting to the server
-n <db>        Database number
```

All of these options affect the 'default' connection.

Now you can run,
```bash
$ redis-browser -h 10.0.10.5 -a "password123"
```