uutils tar is a cross-platform reimplementation of tar in Rust.

This package installs ${PREFIX}/bin/gtar, the name used by
archivers/gtar.  It conflicts with archivers/gtar and declares it as a
secondary pkgpath, so the package tools accept it as a provider of that
path.  The GNU package must not be installed at the same time.

Upstream has not made a release yet: the package is built from a pinned
commit and the remote archive helper grmt(8) is not provided.
