nxstack in 9-STABLE

[Oliver Pinter]

Hi Konstantin!

Do you have any plan, to MFC to 9-STABLE this commit: r230767 in HEAD

commit f3be56eac8844592f627e88d16ec8ef761473512
Author: kib <kib at ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date:   Mon Jan 30 07:56:00 2012 +0000

    Finally, try to enable the nxstacks on amd64 and powerpc64 for both 64bit
    and 32bit ABIs. Also try to enable nxstacks for PAE/i386 when supported,
    and some variants of powerpc32.

    MFC after:  2 months (if ever)


    git-svn-id: svn://svn.freebsd.org/base/head@230767 ccf9f872-aa2e-dd11-9fc8-0