Add forgotten util.c

Remove some debug cruft

Properly quotes the arguments where needed

After some test cross building still works for me :)

I first need to check if that does not break "simple" cross building, but a part from that it looks fine. I'll try to check asap.

Also remove zlib inclusion

Add zgrep also when bsdgrep is installed

Stop removing lz* and xz* versions of grep

Fix a typo in the zstdcat arguments

when linking to libpkg there is no need to directly link to libarchive (the dependency is not exposed to the consumers) it is an internal only dependency, given this tests used readelf, there is no reason to find base libarchive there. If libarchive is found then there is an issue with the said port.

Correct year for copyright

Actually add the code :)