Where are patch releases to 12.0 posted/announced/...?

[George Hartzell]

Is there a way to know, before fetching updates, whether a system is
up to date (or what the current patch level is for a release)?

E.g.  I have a system that I installed from the 12.0 release iso and
I've run through the `freebsd-uppdate {fetch,install}` dance a couple
of times.  It now reports itself as this:

```
FreeBSD foo.example.com 12.0-RELEASE-p4 FreeBSD 12.0-RELEASE-p4
GENERIC  amd64
```

I'm not sure if it's up to date or not.

In the past I've run `freebsd-update fetch` and examined the output to
decide if I need to `freebsd-update install`.  If I postpone the
install (scheduling a convenient time), I always feel a bit awkward,
having an update fetched and sitting there.  The only rational reason
for the feeling is worrying what would happen if another update was
release before I got this one installed.  And, perhaps I'm just a neat
freak...

Is there a page somewhere that lists the current patch releases of
the current versions?

I've checked:

- the releases page: https://www.freebsd.org/releases
- the 12.0 errata page: https://www.freebsd.org/releases/12.0R/errata.html
- the `freebsd-announce`:
  https://lists.freebsd.org/pipermail/freebsd-announce/) list, which
  has messages about individual issues, but I don't see release
  announcements.

I feel like I'm missing something obvious, but....

g.