This makes little sense due to how HLS works, and only causes some
additional annoyances if the HLS read_seek function fails (for example
if it's a live stream). It was most likely unintended.
.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
.priv_class = &hls_class,
.priv_data_size = sizeof(HLSContext),
+ .flags = AVFMT_NOGENSEARCH,
.read_probe = hls_probe,
.read_header = hls_read_header,
.read_packet = hls_read_packet,