Remove $FreeBSD$: one-line sh pattern

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

pkgbase: Add a FreeBSD-bluetooth package

Move the bluetooth related files from FreeBSD-runtime to a new package named
FreeBSD-bluetooth
The FreeBSD runtime is only intended to have everything for a working
FreeBSD installation and bluetooth isn't needed for that.

Reviewed by: bapt, gjb
Differential Revision: https://reviews.freebsd.org/D20959

Add `bluetooth-config` script to simplify setting up bluetooth connections to
devices like mice, keyboards, bt-audio, ...

This script currently allows scanning for nearby devices, adds one to
/etc/bluetooth/hosts, adds an entry to hcsecd's conf and if it is a HID, add an
entry to bthidd's configs, as well.

Submitted by: erdgeist <erdgeist@erdgeist.org>
Approved by: bapt
MFC after: 2 weeks
Differential Revision: D3778
Reviewers: bapt, emax