Add localedef(1), a locale definition generator tool

The localedef tool can read entire (and unmodified) CLDR posix definition
files, and generate all 6 LC categories: LC_COLLATE, LC_CTYPE, LC_TIME,
LC_NUMERIC, LC_MONETARY and LC_MESSAGES.

This tool has a long history with Solaris. The Nexenta developers
modified it to read CLDR files and created the much richer collation
formats. The libc collation functions have to be modified to read the
new format (called "BSD-1.0") and to handle the new data structures.

The result will be that locale-sensitive tools and functions will now
properly sort multibyte and unicode strings.

Obtained from: Dragonfly