rstone 5841bd2035 Fix incorrect error message in iovctl
If the iovctl command was invoked with only the -C flag, the user would
receive a message claiming that they needed to also supply either the
-d flag or the -f flag.  However, in the case of the -C mode, only the
-f flag is acceptable.  Correct this error message in this case.

PR:		222050
Submitted by:	Heinz N. Gies
Reported by:	Heinz N. Gies
MFC after:	1 week
2017-09-12 21:12:04 +00:00
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