bozo: fix typo in help text

bozo: fix typo in help text

Fix a typo for "interface" in the help text for bosserver.

Change-Id: I042fc52e46f50dd00be9fc9bf62525a0f2755dda
Reviewed-on: http://gerrit.openafs.org/8144
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jason Edgecombe <jason@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>