Runs a loopback forwarder per region-named profile (unshackle-<region>), so
--proxy and --proxy-download can exit in different countries
Thanks to Orni_ for the original code and the test account.
Co-authored-by: AntCardFr <24798811+AntCardFR@users.noreply.github.com>
Route titles with a dtsx/dtsy sample entry to MP4 via MP4Box, since Matroska has no CodecID for DTS-UHD. Add per-rendition HLS audio codec selection, fix merge_segments progress and its cleanup path.
