illumos gate

By reading some SMF scripts I discovered that "/sbin/zonename" takes some parameters, at least "-t" to return the ip-type (shared or exclusive). There's nothing of the kind mentioned in neither the manpage, nor the command-line help (seems absent).

PRIMARY QUEST: Read the code and find used command-line params, and describe them in the manpage.
OPTIONAL QUEST: If there is indeed no "command-line help" blurb in the program, make one.