K 10
svn:author
V 6
brooks
K 8
svn:date
V 27
2016-12-21T23:16:58.428959Z
K 7
svn:log
V 315
MFC r310092:

Add a free_iovec() function to reset iovec's.

The primary purpose is to call nmount() in a loop with new iovec's so
free_iovec takes arguments by reference and resets their values.

Reviewed by:	cem
MFC after:	1 week
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D8513

END