cyrus-sasl's license certainly is free (something similar to BSD-4), so the ebuild should probably get a LICENSE which is included in the @FREE license set. (See the "Clarify the as-is license" thread on gentoo-dev, started on 12/09/23, for further reference.)
LICENSE="BSD-4" looks good to me.
+ 05 Nov 2012; Eray Aslan <eras@gentoo.org> cyrus-sasl-2.1.23-r6.ebuild, + cyrus-sasl-2.1.25-r1.ebuild, cyrus-sasl-2.1.25-r2.ebuild, + cyrus-sasl-2.1.25-r3.ebuild, cyrus-sasl-2.1.25.ebuild: + License as-is -> BSD-4 +