debian; Avoid installing ovs-vswitchd.conf.db manpage as "db" language.

Usually, when the name of a manpage has a two-letter extension, it means
that the manpage is written in the language designated by that language
code.

Reported-by: Michael Stapelberg <stapelberg@debian.org>
Reported-at: https://bugs.debian.org/850631
Signed-off-by: Ben Pfaff <blp@ovn.org>
Tested-by: nickcooper-zhangtonghao <nic@opencloud.tech>

AUTHORS.rst

@@ -459,6 +459,7 @@ Michael Hu                      mhu@nicira.com
 Michael J. Smalley              michaeljsmalley@gmail.com
 Michael Mao                     mmao@nicira.com
 Michael Shigorin                mike@osdn.org.ua
+Michael Stapelberg              stapelberg@debian.org
 Mihir Gangar                    gangarm@vmware.com
 Mike Bursell                    mike.bursell@citrix.com
 Mike Kruze                      mkruze@nicira.com

debian/rules

@@ -96,3 +96,6 @@ override_dh_strip:
 	dh_strip --dbg-package=openvswitch-dbg
 
 override_dh_usrlocal:
+
+override_dh_installman:
+	dh_installman --language=C