Baptiste Daroussin 1926f2f6fa Modify pw_copy:
- if pw is NULL and oldpw is not NULL then the oldpw is deleted
- if pw->pw_name != oldpw->pw_name but pw->pw_uid == oldpw->pw_uid
then it renames the user

add new gr_* functions so now gr_util API is similar to pw_util API,
this allow to manipulate groups in a safe way.

Reviewed by:	des
Approved by:	des
MFC after:	1 month
2011-12-15 22:07:36 +00:00
..
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