RFR: Port of FreeBSD *context routines to DFly

[Matthew Dillon]

:I have completed the port of [set|get|make|swap]context from FreeBSD to
:DFly.
:
:The latest patch set against HEAD (current as of Jan 12, 00:00 EST) is
:available here: http://www.gsicomp.on.ca/~matt/dfly
:
:I (and others) would really like to see this get into the release, so I
:would appreciate reviews and comments.  Nothing too earth-shattering here -
:it's a straight port with some minor modifications due ot Matt's recent
:VKERNEL and trapframe changes.
:
:Regards,
:--
:Matt Emmerton

    I will put it into the release.  It looks good.  The only thing I
    would change is to put the new context code you added to
    machine/pc32/i386/machdep.c into a new file in cpu/i386/misc instead,
    so it can be used by both the VKERNEL and the PC32 builds.

    Unless you say otherwise, I will commit it later this evening.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>