Log Message:
Update to shadow-4.0.4.1. This fixes some security issues.

Redid how the PKG_OPTIONS are done. This supports
PKG_SUPPORTED_OPTIONS= PAM libcrack

If using PAM, install some example PAM configurations
and have a message about this.

I don't include all changes here. The ChangeLog is too long. Some
of the changes include:
- usage message improvements
- fixed memory overwrite on 64bit architecture
- fixed seg fault in usermod,useradd
- removed dead code
- added new man pages for various languages