Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

devd(8): Fix a typo in a configuration file

- s/coresponding/corresponding/

MFC after: 3 days

Move all devd related configs to sbin/devd/

This helps with pkgbase as it switches these to using CONFS so they are
properly tagged as config files.

Approved by: will (mentor), imp
Differential Revision: https://reviews.freebsd.org/D16781