lavf/rtsp.c: Fix stimeout option not applied on http tunnel

stimeout option is already used in tcp transport, since
http is based on tcp, pass the option to http for tunneling
case.
Reviewed-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: Jun Li <junli1026@gmail.com>

libavformat/rtsp.c

@@ -1744,6 +1744,9 @@ redirect:
         char httpname[1024];
         char sessioncookie[17];
         char headers[1024];
+        AVDictionary *options = NULL;
+
+        av_dict_set_int(&options, "timeout", rt->stimeout, 0);
 
         ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
         snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
@@ -1774,7 +1777,8 @@ redirect:
         }
 
         /* complete the connection */
-        if (ffurl_connect(rt->rtsp_hd, NULL)) {
+        if (ffurl_connect(rt->rtsp_hd, &options)) {
+            av_dict_free(&options);
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1818,10 +1822,12 @@ redirect:
         ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
 
         /* complete the connection */
-        if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
+        if (ffurl_connect(rt->rtsp_hd_out, &options)) {
+            av_dict_free(&options);
             err = AVERROR(EIO);
             goto fail;
         }
+        av_dict_free(&options);
     } else {
         int ret;
         /* open the tcp connection */