Upgraded 11.2 -> 12.0, ntpd Won't Start

[B J]

Before I did the upgrade, I ran ntpd by putting

ntpd_enable="YES"

in:

/etc/rc.conf

Now, when I boot my computer, I get:

Security policy loaded: MAC/ntpd (mac_ntpd)
Starting ntpd.
su: unknown login: ntpd
/etc/rc: WARNING: failed to start ntpd

The upgrade to 12.0 was done with the following:

freebsd-update fetch
freebsd-update install
freebsd-update -r 12.0-RELEASE upgrade

I restarted the machine and ran:

/usr/sbin/freebsd-update install

when prompted to do so.  I also reinstalled all the packages and, I
believe, ports.  I didn't, however, run mergemaster or:

pwd_mkdb -p /etc/master.passwd

nor do I recall being prompted to do so during the upgrading process.
(Maybe I wasn't paying attention.)

Can I get ntpd to run if I ran:

pwd_mkdb -p /etc/master.passwd

Does anyone have any other suggestions?

BMJ