dev-libs/nss-3.17.3 was released on 2014-12-01.
+*nss-3.17.3 (04 Dec 2014) + + 04 Dec 2014; Lars Wendler <polynomial-c@gentoo.org> -nss-3.16.ebuild, + -nss-3.16.3.ebuild, -nss-3.17.1.ebuild, +nss-3.17.3.ebuild: + Version bump by arfrever (bug #531622). Removed old. +