add HISTORY and AUTHORS; listed there Kengo Nakahara as he seems to be the

primary author according to commits, feel free to adjust as appropriate

share/man/man9/pci_msi.9

@@ -1,4 +1,4 @@
-.\" $NetBSD: pci_msi.9,v 1.13 2016/09/16 13:56:36 jdolecek Exp $
+.\" $NetBSD: pci_msi.9,v 1.14 2016/09/17 17:10:21 jdolecek Exp $
 .\"
 .\" Copyright (c) 2015 Internet Initiative Japan Inc.
 .\" All rights reserved.
@@ -24,7 +24,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd September 15, 2016
+.Dd September 17, 2016
 .Dt PCI_MSI 9
 .Os
 .Sh NAME
@@ -314,3 +314,17 @@ for MSI, and
 for others.
 .Sh SEE ALSO
 .Xr pci_intr 9
+.Sh HISTORY
+.Nm
+support first appeared in
+.Nx 8.0 .
+Support is present on
+.Em i386
+and
+.Em amd64
+architectures.
+.Sh AUTHORS
+The
+.Nm
+interfaces were designed and implemented by
+.An Kengo Nakahara .