freebsd-update fetch trying to update custom kernel

[Denis]

> Then why not follow my suggestion of _letting_ freebsd-update
> update the kernel, but _use_ a different one instead which it
> won't touch? In /boot/loader.conf:
>
>         kernel="mykernel"
>         bootfile="/boot/mykernel/kernel"
>
> Now freebsd-update can happily alter the default kernel without
> affecting yours. Note that this implies that _you_ have to take
> care of kernel changes and recompiling if needed.
>
> I know, it's just a workaround and doesn't address the problem
> directly, but it should get you away from any related trouble.

Yes, I saw your advice, and will follow it.
The main idea - may be I missed something and there will be an easy
fix to my problem. I want to make sure that the problem exists, and
I'm not the only person faced with this error. And also I have a small
hope that problem will be fixed by freebsd team :-).

Best regards,
Denis