Reduce PID finding retries and simply proc interface on linux

network/state/lookup.go

@@ -28,6 +28,11 @@ var (
 	ErrPIDNotFound        = errors.New("could not find pid for socket inode")
 )
 
+const (
+	lookupTries     = 5
+	fastLookupTries = 2
+)
+
 // Lookup looks for the given connection in the system state tables and returns the PID of the associated process and whether the connection is inbound.
 func Lookup(pktInfo *packet.Info, fast bool) (pid int, inbound bool, err error) {
 	// auto-detect version