DragonFlyBSD

dmesg(1) on OpenBSD (and I imagine on most other operating systems) shows
the boot console messages, including
a list of the (probed) hardware, CPU clock speed etc.

But on leaf.dragonflybsd.org the dmesg(1) output is not the same. It seems
to be inconsistent and seems to
be a garbled version of /var/log/messages.

I think this is wrong. DragonFlyBSD dmesg(1) should output the same as other
operating systems, in
particular the probed hardware list which you get on the console when the
computer boots.