
Adjust README.

usermod -U/-L: Implement!!

check all malloc/realloc return values for out of memory errors.

lib/{user.c,group.c}: Check return values of chown/chmod.

usermod: LDAP: If login is renamed, rename dn, too.

groupmod: Implement renaming of group entries in LDAP.

userdel, groupdel, grpunconv: write tests.

passwd: Make password locking/unlocking work with LDAP (nss_ldap
	seems to insert always a "x" as password).

