Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

bluetooth: Fix a mandoc related issues

- new sentence, new line
- sections out of conventional order: Sh FILES
- unusual Xr order: bthost(1) after bthidd(8)
- no blank before trailing delimiter
- whitespace at end of input line
- sections out of conventional order: Sh EXIT STATUS

MFC after: 1 week

Fix duplication.

The patch adding the manpage was probably applied twice, so it resulted
in duplication of the manpage

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