Dave - Versioning

Hi Allan & Kris

thanks for the show as always. A couple of questions regarding updates:

1.  How do you know your FreeBSD system is up to date, assuming we're
using a GENERIC kernel and the trusty freebsd-update utility?

For example, I notice often after running `freebsd-update fetch install`
& rebooting, that freebsd-version is not consistent - why is that?

> freebsd-version -ku

10.3-RELEASE-p4
10.3-RELEASE-p5

In FreeBSD 10, uname(1) gained support for the -K and -U flags & in
11.0-CURRENT there's an extension to periodic.conf that uses this to
tell us whether kernel and user space are aligned:

> uname -KU
1003000 1003000

Which seems fine but doesn't match

To top it off:

> sysctl kern.version
kern.version: FreeBSD 10.3-RELEASE-p4 #0: Sat May 28 12:23:44 UTC 2016
    root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC

> sysctl kern |fgrep .os
kern.ostype: FreeBSD
kern.osrelease: 10.3-RELEASE-p4
kern.osrevision: 199506
kern.osreldate: 1003000

Who can we trust these days?

2. Running mergemaster or etcupdate manually is impractical with
automation tools, so how do people manage /etc during upgrades across a
large fleet of FreeBSD servers?

A+
Dave