avformat/dashdec: add http_proxy, referer and rw_timeout http method support for segments

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

libavformat/dashdec.c

@@ -1834,7 +1834,9 @@ end:
 static int save_avio_options(AVFormatContext *s)
 {
     DASHContext *c = s->priv_data;
-    const char *opts[] = { "headers", "user_agent", "cookies", NULL }, **opt = opts;
+    const char *opts[] = {
+        "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", NULL };
+    const char **opt = opts;
     uint8_t *buf = NULL;
     int ret = 0;