9nbd: is munged -f (force) option really needed in MUNGE bootstrap?

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In 9nbd MUNGE bootstrap, we run munged with the -f option.
Why?  I can't remember.  Chris would like me to run this down.

if [[ "$nbdopts" =~ "auth=munge" ]]; then
    umask 077
    diodcat -p -s "$nbdserver" -a "$keydir" munge.key >/tmp/munge.key || exit 1
    umask 022
    mkdir -p /var/run/munge /var/lib/munge /var/log/munge
    dioddate -S -s "$nbdserver"
    munged --key /tmp/munge.key -f || exit 1
    echo "create user munge * |/usr/bin/munge" >/etc/request-key.conf
    echo "MUNGE started"
fi

Original issue reported on code.google.com by garlick....@gmail.com on 8 May 2013 at 4:22