Just a nit, but the guide advises setting the UNICODE variable in /etc/rc.conf but openrc has moved to lowercase configuration variables. Should be corrected to "unicode". - John
This document has been moved to the Gentoo wiki and can be found at https://wiki.gentoo.org/wiki/UTF-8. We welcome any contributions on this guide and recommend you create an account (if you do not have one already) and make the adjustments to the article as needed. In case of doubt, use the Talk page to discuss potential changes before applying them. I've made the modification on it as suggested already though.
Obsolete? When you made the change I requested? Heh. ;)