rtnetlink: add keepalived rtm_protocol

Keepalived can set global static ip routes or virtual ip routes dynamically
following VRRP protocol states. Using a dedicated rtm_protocol will help
keeping track of it.

Changes in v2:
 - fix tab/space indenting
Signed-off-by: Alexandre Cassen <acassen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/rtnetlink.h

@@ -281,6 +281,7 @@ enum {
 #define RTPROT_NTK		15	/* Netsukuku */
 #define RTPROT_DHCP		16	/* DHCP client */
 #define RTPROT_MROUTED		17	/* Multicast daemon */
+#define RTPROT_KEEPALIVED	18	/* Keepalived daemon */
 #define RTPROT_BABEL		42	/* Babel daemon */
 #define RTPROT_BGP		186	/* BGP Routes */
 #define RTPROT_ISIS		187	/* ISIS Routes */