Ignore range request on m3u8 rewrite

If a m3u8 is requested with a range request and gets rewritten, e.g.
adding the sessionid, the announced content-range may not correspond
to the content-length. In this cases the range request is ignored
and the full m3u8 will be returned.

http/middleware/session/HLS.go

@@ -154,6 +154,10 @@ func (h *handler) handleHLSEgress(c echo.Context, ctxuser string, data map[strin
 			}
 		}
 
+		// Remove any Range request headers, because the rewrite will mess up any lengths.
+		req.Header.Del("Range")
+		req.Header.Del("If-Range")
+
 		rewrite = true
 	}