Released in 2010, but slightly more recent than the one in tree. See changelog.
+ 17 Sep 2013; Tom Wijsman <TomWij@gentoo.org> + +files/squidguard-1.5_beta-gentoo.patch, +squidguard-1.5_beta.ebuild: + Version bump to 1.5_beta. EAPI 5. Dropped the patches that were applied + upstream. Fixes bug #485148, reported by Manuel Rüger (mrueg).