add debug flags for arp, lldp, and snmp discovery

cmd/tendrils/main.go

@@ -13,6 +13,9 @@ func main() {
 	noSNMP := flag.Bool("no-snmp", false, "disable SNMP discovery")
 	logTree := flag.Bool("log-tree", false, "log full tree on changes")
 	logReasons := flag.Bool("log-reasons", false, "log addition reasons")
+	debugARP := flag.Bool("debug-arp", false, "debug ARP discovery")
+	debugLLDP := flag.Bool("debug-lldp", false, "debug LLDP discovery")
+	debugSNMP := flag.Bool("debug-snmp", false, "debug SNMP discovery")
 	flag.Parse()
 
 	t := tendrils.New()
@@ -22,5 +25,8 @@ func main() {
 	t.DisableSNMP = *noSNMP
 	t.LogTree = *logTree
 	t.LogReasons = *logReasons
+	t.DebugARP = *debugARP
+	t.DebugLLDP = *debugLLDP
+	t.DebugSNMP = *debugSNMP
 	t.Run()
 }