rtspclientsink does not support URI queries

The rtspclientsink does not support queries, as it simply concatenates the stream=X onto the url.

Steps to reproduce

Configure a rtspclientsink to use a location, which contains a query, e.g.

rtspclientsink location=rtsp://127.0.0.1/test?filename=my_file.ts

The rtspclientsink will attempt to connect stream 0 to: rtsp://127.0.0.1/test?filename=my_file.ts/stream=0, rather than rtsp://127.0.0.1/test/stream=0?filename=my_file.ts.