Fix up the description of m_copyback_cow(), which was at best
ambiguous, and at worst, wrong.
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@ -1,4 +1,4 @@
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.\" $NetBSD: mbuf.9,v 1.40 2005/08/23 09:34:11 yamt Exp $
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.\" $NetBSD: mbuf.9,v 1.41 2006/03/29 19:36:55 riz Exp $
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.\"
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.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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@ -34,7 +34,7 @@
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 23, 2005
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.Dd March 29, 2006
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.Dt MBUF 9
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.Os
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.Sh NAME
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@ -360,12 +360,11 @@ on read-only mbufs.
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If needed,
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.Fn m_copyback_cow
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automatically allocates new mbufs and adjusts the chain.
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It returns a pointer to the resulting mbuf chain on success.
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On success, it returns a pointer to the resulting mbuf chain,
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and frees the original mbuf
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.Fa m0 .
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Otherwise, it returns
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.Dv NULL .
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In that case, the original mbuf
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.Fa m0
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will be freed.
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The
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.Fa how
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parameter is a choice of
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