NOxxx= variables should appear first

MKfoo=no -> NOfoo

Use
${MAKE}
instead of
make

convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

1) RCSid police
2) Add __RCSIDs where apropriate.
3) WARNS=1, and clean up sources for WARNS=1 (including replacement of
a mktemp with a mkstemp even though it was probably safe...)
4) Some other

1) RCSid police
2) Add __RCSIDs where apropriate.
3) WARNS=1, and clean up sources for WARNS=1 (including replacement of
a mktemp with a mkstemp even though it was probably safe...)
4) Some other small cosmetic changes

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crunch, from James da Silva at UMD