On inspection, the licence provided in the source (LEAGAL.NOTICE) looks nearly the same as BSD-2. At least, BSD-2 is probably a better description then the 'as-is' catchall. Thanks.
indeed, the COPYING is what we call BSD-2 and every other distribution also refers to it as BSD ... + 04 Aug 2011; Samuli Suominen <ssuominen@gentoo.org> file-5.08.ebuild: + Change license from as-is to BSD-2 per COPYING wrt #263551 by Justin Bronder