From: Daniel Lezcano <dlezcano@fr.ibm.com>

lt-lxc-unshare <options> [command]
Options are:
	 -f      : fork and unshare (automatic when unsharing the pids)
	 -m      : unshare the mount points
	 -p      : unshare the pids
	 -h      : unshare the utsname
	 -i      : unshare the sysv ipc
	 -n      : unshare the network
	 -u <id> : unshare the users and set a new id
	 if -f or -p is specified, <command> is mandatory)
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>