Function gstreamer_rtsp_server_sys::gst_rtsp_auth_add_digest

pub unsafe extern "C" fn gst_rtsp_auth_add_digest(
    auth: *mut GstRTSPAuth, 
    user: *const c_char, 
    pass: *const c_char, 
    token: *mut GstRTSPToken
)

This is supported on crate feature v1_12 only.