[arch-announce] rsync compatibility

[Arch Linux: Recent news updates: Christian Hesse]

Our `rsync` package was shipped with bundled `zlib` to provide compatibility
with the old-style `--compress` option up to version 3.1.0. Version 3.1.1 was
released on 2014-06-22 and is shipped by all major distributions now.

So we decided to finally drop the bundled library and ship a package with
system `zlib`. This also fixes security issues, actual ones and in future. Go
and blame those running old versions if you encounter errors with `rsync
3.1.3-3`.

URL: https://www.archlinux.org/news/rsync-compatibility/