Vodz' last_patch31

    Very minimal last corrections:

    1) busybox.c: fix warining
    2) docs/: add applets for list from pwd_grp
    3) usage.h: add -n option for route
    4) run_parts.c: many todo fix for busybox style
    5) addgroup.c: add #ifdef CONFIG_FEATURE_SHADOWPASSWDS, reduce one
    perror_msg
    6) adduser.c: fix bug "variable i not initialize" and
       add #ifdef CONFIG_FEATURE_SHADOWPASSWDS
6 files changed