Added Cisco's vendor id , sent by 1131ag.

FossilOrigin-Name: 6c784c92408f8f26e9f4a216aa8e57a75b8c3b3eaddea9743c60c67f50138aaf

src/capwap/cw_ianavendoridtostr.c

@@ -8,6 +8,8 @@ const char * cw_ianavendoridtostr(int id){
 			return "ZyXEL Communications Corp.";
 		case 11591:
 			return "Free Software Foundation";
+		case 4232704:
+			return "Cisco";
 		default:
 			return "Unknown";
 	}