MFC r343572:
Add support for Audio Sink and Audio Source profiles to sdpd(8).

This allows user-space programs like virtual_oss(8) to act
as a Bluetooth speaker device.

Sponsored by: Mellanox Technologies

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Add PSM and Load Factor SDP parameters to the BNEP based profiles
(NAP, GN and PANU). No reason to not to support them.

Separate SDP parameters data structures for the BNEP based profiles.

Generalize Service Availability SDP parameter creation.

Requested by: Iain Hibbert < plunky at rya-online dot net >
MFC after: 3 days

Add support for the NAP, GN and PANU profiles to the sdpd(8).
It should be mentioned that a somewhat similar patch was
submitted by Rako < rako29 at gmail dot com >

MFC after: 1 week

Avoid casts as lvalues.

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