ALL:
- move base passwd/shadow/group/gshadow operation to module for allow write
 diffrent backend modules for db, NIS, LDAP and others. Default backend it
 will be goot if will be choosen depending on /etc/nsswitch.conf and allow
 overwride this by -r <repository> options (where the <repository> can be
 file, db, nis nisplus, ldap .. like on /etc/nsswitch.conf in service column).
 passwd have old piece of code with handling -r option and it will be good
 finish this and propagate on other shadow tools for allow operate on other
 user databases by well known tools.

- useradd:
 - add handle create user mail spool in maildir format.

- add handle -n switch in groups and id command for allow query is
 group/user with specified id/gid exist - this will be very useable
 on automation in packages for quoery/check is group/user exist in system
 or not,

- groupmems:
 - need some work on add PAM and i18n support.

- userdel:
 - add backup option on remomove user resources,
 - add lookop and remove per user group.

Documentation:

- documment in pt_BR, ja man pages -s {pw,grp}ck option,

- document -o option in ja man page,