Merge branch 'V5-4-patches' into V5-5-patches

* V5-4-patches:
  Prepare for FreeBSD 11 and 12.
diff --git a/include/net-snmp/system/freebsd10.h b/include/net-snmp/system/freebsd10.h
index 871b9df..c97849e 100644
--- a/include/net-snmp/system/freebsd10.h
+++ b/include/net-snmp/system/freebsd10.h
@@ -1,3 +1,3 @@
-/* freebsd9 is a superset of freebsd10 */
+/* freebsd10 is a superset of freebsd9 */
 #include "freebsd9.h"
 #define freebsd10 freebsd10
diff --git a/include/net-snmp/system/freebsd11.h b/include/net-snmp/system/freebsd11.h
new file mode 100644
index 0000000..b400848
--- /dev/null
+++ b/include/net-snmp/system/freebsd11.h
@@ -0,0 +1,3 @@
+/* freebsd11 is a superset of freebsd10 */
+#include "freebsd10.h"
+#define freebsd11 freebsd11
diff --git a/include/net-snmp/system/freebsd12.h b/include/net-snmp/system/freebsd12.h
new file mode 100644
index 0000000..fc99ae4
--- /dev/null
+++ b/include/net-snmp/system/freebsd12.h
@@ -0,0 +1,3 @@
+/* freebsd12 is a superset of freebsd11 */
+#include "freebsd11.h"
+#define freebsd12 freebsd12