net-misc/ntp-4.2.0-r2 uses "ntpdate" for NTPCLIENT_CMD for /etc/init.d/ntp-client. The ntpdate man page says it will go away soon, and "ntpd -q" has the same functionality.
Please use "New -> Gentoo Linux -> Component: Ebuilds" in future. Infrastructure is not the correct addressee.
*** This bug has been marked as a duplicate of 21527 ***