and similarly for mkfifo and mknod.
ls now refuses to generate time stamps containing more than 1000 bytes, to
foil potential denial-of-service attacks on hosts with very large stacks.
+ "mkdir -m =+x dir" no longer ignores the umask when evaluating "+x",
+ and similarly for mkfifo and mknod.
+
"pr -D FORMAT" now accepts the same formats that "date +FORMAT" does.
test now detects integer overflow when evaluating large integers,