Add -o to usermod and groupmod to allow non unique ids and chown the logdir
Add -o to usermod and groupmod to allow non unique ids and chown the logdir

This fixes issue #68 , in addition it also heads off issues with non unique user ids
and in the process of testing I discovered an issue with the log dirs not being owned
by the right user/group, I added that to the DIRS variable to correct as well.

fxstein/unifi