RTMP: Support standard uri like http.

The rtmp uri is not standard, for example:

```
rtmp://127.0.0.1:1935/app?vhost=ossrs.net/stream
```

Which should support the standard uri like http, to pass the query in stream:

```
rtmp://127.0.0.1:1935/app/stream?vhost=ossrs.net
```
