PORTVERSION --> DISTVERSION
Use GitHub as primary MASTER_SITE and libarchive.org as fallback
Enable ZSTD by default
Use xz tarball instead of gz (smaller size)
Remove entries for DESC that are already defined in framework
Disable static library
Slightly rearrange Makefile for readability
Changelog: https://github.com/libarchive/libarchive/releases/tag/v3.5.2