Fix error in the description of BUF_reverse(3), tweaked by me.

OpenSSL commit 498180de5c766f68f6d2b65454357bc263773c66
Author: Dmitry Belyavskiy <beldmit@gmail.com>
Date:   Mon Dec 12 15:35:09 2016 +0300

1 files changed, 10 insertions, 5 deletions

diff --git a/src/lib/libcrypto/man/BUF_MEM_new.3 b/src/lib/libcrypto/man/BUF_MEM_new.3
index d6a728ff05..8a5b367a07 100644
--- a/src/lib/libcrypto/man/BUF_MEM_new.3
+++ b/src/lib/libcrypto/man/BUF_MEM_new.3
@@ -1,5 +1,9 @@
-.\"     $OpenBSD: BUF_MEM_new.3,v 1.9 2016/12/06 12:24:33 schwarze Exp $
-.\"     OpenSSL 18edda0f Sep 20 03:28:54 2000 +0000
+.\"     $OpenBSD: BUF_MEM_new.3,v 1.10 2016/12/16 08:49:43 schwarze Exp $
+.\"     OpenSSL doc/crypto/buffer.pod 18edda0f Sep 20 03:28:54 2000 +0000
+.\"     not merged: 74924dcb, 58e3457a, 21b0fa91, 7644a9ae
+.\"     OpenSSL doc/crypto/BUF_MEM_new.pod 53934822 Jun 9 16:39:19 2016 -0400
+.\"     not merged: c952780c, 91da5e77
+.\"     OpenSSL doc/man3/BUF_MEM_new.pod 498180de Dec 12 15:35:09 2016 +0300
 .\"
 .\" This file was written by Ralf S. Engelschall <rse@openssl.org>.
 .\" Copyright (c) 1999, 2000, 2016 The OpenSSL Project.  All rights reserved.
@@ -48,7 +52,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: December 6 2016 $
+.Dd $Mdocdate: December 16 2016 $
 .Dt BUF_MEM_NEW 3
 .Os
 .Sh NAME
@@ -143,10 +147,11 @@ bytes at
 into
 .Fa out .
 If
-.Fa out
+.Fa in
 is
 .Dv NULL ,
-the array is reversed in place.
+.Fa out
+is reversed in place.
 .Pp
 .Fn BUF_strdup
 copies a NUL terminated string into a block of allocated memory and