Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

- One can use both BD_ADDR or name to specify address of the Bluetooth device.
Update man pages to document this fact.

- Update usage messages

- Change u_intXXX to uintXXX

Import sdpd(8) sources. This is Bluetooth Service Discovery Protocol daemon.
Extend libsdp(3) API to allow service registration and removal.
Fix uninitialized variable bug in sdpcontrol(8).

Reviewed by: imp (mentor)
No objection: ru

Change sdp_open_local(3) API. It now takes a path to a control socket
Teach sdpcontrol(8) how to talk to the local SDP server
Update man pages
s/u_int/uint

Reviewed by: imp (mentor), ru

Update Bluetooth code.

Reviewed by: M. Warner Losh <imp@bsdimp.com>; John Hay <jhay@freebsd.org>
Approved by: M. Warner Losh <imp@bsdimp.com> (mentor)