patch: update iwi(4)

[Matthew Dillon]

::* The alloc_unr()/free_unr() stuff is just commented out. Are there
::  any plans to bring in this API from FreeBSD?
::
:
:    That doesn't look optional.  Sigh. I suppose you could port subr_unit.c
:    but as is typical in FreeBSDland they have completely overengineered
:    the API.  It would be a whole lot easier if they had just used the
:    subr_blist.c code for that.

    Rui also mentioned that AlexH thought the clone_bitmap code would
    work just fine too.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>