Some types of package installation fail after upgrading from 12.1-RELEASE

[Graham Perrin]

Multiple test results here suggest that a clean installation of 
12.1-RELEASE on AMD64, followed by an upgrade to 12.2-RELEASE-p3, will 
fail to install databases/mysql57-server. More specifically:

/var/log/userlog will be without [root:useradd] lines for cyrus(60) and 
mysql(88).

On one hand: I'm inclined to ignore failures such as this, since 12.1 
reached end of life at the end of January.

On the other hand: the FreeBSD-supplied ISO for 12.2 is incompatible 
with some real and virtual machines (a known issue); in these cases, use 
of the ISO for 12.1 can be a workaround.

Thoughts?