Whether the `xinetd' USE flag is enabled or not, /etc/xinetd.d/fingerd will always be installed. A dependency should also be placed on `sys-apps/xinetd' if the flag is enabled.
ive punted the IUSE=xinetd http://sources.gentoo.org/net-misc/netkit-fingerd/netkit-fingerd-0.17-r3.ebuild?r1=1.3&r2=1.4