netgraph: remove remnants of IPPROTO_DIVERT

Fixes:	8624f4347e

share/examples/netgraph/ngctl

@@ -36,7 +36,7 @@
     + mkpeer ksocket foo divert/raw/0
 
 # Note that ``foo'' is the hook name on the socket node, which can be
-# anything.  The ``inet/raw/divert'' is the hook name on the ksocket
+# anything.  The ``divert/raw/0'' is the hook name on the ksocket
 # node, which tells it what kind of socket to create.
 
 # Lets give our ksocket node a global name.  How about ``fred'':

sys/netgraph/ng_ksocket.c

@@ -165,7 +165,6 @@ static const struct ng_ksocket_alias ng_ksocket_protos[] = {
 	{ "ah6",	IPPROTO_AH,		PF_INET6	},
 	{ "swipe6",	IPPROTO_SWIPE,		PF_INET6	},
 	{ "encap6",	IPPROTO_ENCAP,		PF_INET6	},
-	{ "divert6",	IPPROTO_DIVERT,		PF_INET6	},
 	{ "pim6",	IPPROTO_PIM,		PF_INET6	},
 	{ NULL,		-1					},
 };