Extend bthidd.conf format to store name of remote Bluetooth HID devices and
implement querying of this information with bthidcontrol(8) "Query" command.
Reviewed by: emax
Differential Revision: https://reviews.freebsd.org/D13456
Note: bthidd(8) is still not complete. Need to commit kernel
support (a-la Linux /dev/input) to feed HID events into kernel.
Also need to write bthidd(8) and bthidd.conf(5) man pages.