Add posix flag to handle non-mmaped files. Also fix DUP2 bugs.
Assign nvf2->posix in DUP and DUP2. Currently dd with regular file works.
Allow hub to handle DUP2 with different handlers, so nvp module can run
on sys files. This may be dangerous because I'm modifying hub operation, but
it's the only way.
Use MSG to indicate Posix operations used.
Posix CLOSE fix
Make clean fix
Makefile Macro fix
Merge branch 'master' into bankshot2

Conflicts:
	common.mk