K 10
svn:author
V 3
mdf
K 8
svn:date
V 27
2010-08-12T16:54:43.987586Z
K 7
svn:log
V 255
Fix compile.  It seemed better to have memguard.c include opt_vm.h in
case future compile-time knobs were added that it wants to use.
Also add include guards and forward declarations to vm/memguard.h.

Approved by:    zml (mentor)
MFC after:      1 month

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