[Midnightbsd-cvs] src: kern_shutdown.c: migrate to kdb_enter_why

[laffer1 at midnightbsd.org]

Log Message:
-----------
migrate to kdb_enter_why

Modified Files:
--------------
    src/sys/kern:
        kern_shutdown.c (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/sys/kern/kern_shutdown.c?r1=1.3&r2=1.4)