Patch to include zstd in libarchive

Hi. I needed to read and extract files from tar.zst files, so I’ve created the patches for swipl 10.0.2. The patches work on FreeBSD and I’ve tested by reading headers and by extracting the content of tar.zst files.

I’ve bunded the four patches into a tar file for upload. Unfortunately the upload wont accept tar files and it doesn’t feel right to rename it as an approved file type to bypass the filter. Is there a way to provide for your consideration?

Perhaps it would helpful if I place the files on a public site? Here

http://203.41.22.114:85

for a few weeks..