tree af36fdbe9e6195bec28888820136c735169551f8
parent 1944aac808846675f75f1460128066aed5c0aab6
author Milton Miller <miltonm@us.ibm.com> 1466024543 -0500
committer Milton Miller <miltonm@us.ibm.com> 1466895492 -0500

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>