Function gstreamer_rtsp_sys::gst_rtsp_url_get_request_uri_with_control

pub unsafe extern "C" fn gst_rtsp_url_get_request_uri_with_control(
    url: *const GstRTSPUrl, 
    control_path: *const c_char
) -> *mut c_char

This is supported on crate feature v1_18 only.