don't need to worry about pre/post order and skipping directories.
remove more dead code

zap extra includes

remove some more dead code. (previous diff from Jan Stary)

remove some dead code that's only used in rm

the rm code in mv inherited pledge from rm. it shoud be safe, but there
are cases when it is too strict. after pledge() we continue to run some
of the cp code which requires a very broad set of permissions.
remove pledge entirely for now, pending a complete analysis of needs.

as in rm, needs getpw in pledge

don't need locale header anymore

overwriting code isn't used

trim down the flags in rm

remove getopt() from the nested cp and rm mains

direct copy of cp and rm code into mv, so it can avoid fork+exec.
some or even most of the code can still be streamlined more.
ok deraadt