initfs: update: add --help message

Now that update is intended for use at runtime and not just by
the init and shutdown scripts, add a short help message listing
the options so people don't have to understand how to read shell.

Signed-off-by: Milton Miller <miltonm@us.ibm.com>
1 file changed
tree: 0ba65f04831d3873733ffc75f3bac117cf67e5a2
  1. classes/
  2. common/
  3. conf/
  4. COPYING.apache-2.0
  5. COPYING.MIT
  6. LICENSE