Dan McGee wrote:
`tcp_wrappers` support is being dropped frrom all packages and the package
removed from `[core]`. This is due to upstream not having released a new version
since April 1997. Additionally, newer daemons and applications are inconsistent
in their support for libwrap, leading to confusion as to whether an application
supports the library.
If you currently use `/etc/hosts.allow` or `/etc/hosts.deny` for security or
logging purposes, you will need to adjust accordingly and use another tool such
as `iptables`.
URL: http://www.archlinux.org/news/dropping-tcp_wrappers-support/