netfilter: ipset; bitmap:port set type support

The module implements the bitmap:port type in two flavours, without
and with timeout support to store TCP/UDP ports from a range.
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>

net/netfilter/ipset/Kconfig

@@ -41,4 +41,13 @@ config IP_SET_BITMAP_IPMAC
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 
+config IP_SET_BITMAP_PORT
+	tristate "bitmap:port set support"
+	depends on IP_SET
+	help
+	  This option adds the bitmap:port set type support, by which one
+	  can store TCP/UDP port numbers from a range.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
 endif # IP_SET

net/netfilter/ipset/Makefile

@@ -10,3 +10,4 @@ obj-$(CONFIG_IP_SET) += ip_set.o
 # bitmap types
 obj-$(CONFIG_IP_SET_BITMAP_IP) += ip_set_bitmap_ip.o
 obj-$(CONFIG_IP_SET_BITMAP_IPMAC) += ip_set_bitmap_ipmac.o
+obj-$(CONFIG_IP_SET_BITMAP_PORT) += ip_set_bitmap_port.o