Cliff normally uses short option name aliases which are global
in to the CLI. We want commands to not use them due to the
limited number and ease of collision. However this one
was already in use by a well-known plugin so we will not take it.
Change-Id: Id348dad450b52716b82d7852d6378ecc48808f26
Closes-Bug: #1743578
Signed-off-by: Doug Hellmann <doug@doughellmann.com>