[Midnightbsd-cvs] src: sys/sys: Bring in userland mutxex support from FreeBSD 7.x.

[laffer1 at midnightbsd.org]

Log Message:
-----------
Bring in userland mutxex support from FreeBSD 7.x. This still requries a userland piece in the threading libraries

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