Add and remove groups when for users

src/freedombone-adduser

 chmod 600 /etc/gshadow
 useradd -m -p "$NEW_USER_PASSWORD" -s /bin/bash $ADD_USERNAME
 adduser $ADD_USERNAME sasl
+groupadd $ADD_USERNAME
 chmod 0000 /etc/shadow
 chmod 0000 /etc/gshadow
 

src/freedombone-rmuser

 chmod 600 /etc/shadow
 chmod 600 /etc/gshadow
 userdel -r $REMOVE_USERNAME
+groupdel $REMOVE_USERNAME
 chmod 0000 /etc/shadow
 chmod 0000 /etc/gshadow