Here is a smallish patch to update the Solaris completion routines to match
what's in Solaris 11, Update 1 (which has been out for some time now; my
apologies).

Note that due to OpenSolaris being shuttered by Oracle, the zfs completion
routines may not be correct on other platforms; I don't know whether we
should move them back to the Solaris directory, do so when there's demand,
or what.

Thanks,
Danek