review: kernel GDB: do not reboot the target

From: Eric van Gyzen <eric_at_vangyzen.net>
Date: Mon, 13 Jun 2022 16:16:49 UTC
I would like to call attention to this change to prevent accidentally 
rebooting the target of remote kernel GDB.  The code is mundane, but the 
default could be controversial.

https://reviews.freebsd.org/D35473

Please comment on the review, not on this thread.  If you need an 
account on Phabricator, see:

https://wiki.freebsd.org/Phabricator

Cheers,

Eric