Lighthouse performance pass (#418)

nebula.proto

@@ -1,8 +1,6 @@
 syntax = "proto3";
 package nebula;
 
-option go_package = "github.com/slackhq/nebula";
-
 message NebulaMeta {
   enum MessageType {
     None = 0;
@@ -24,12 +22,12 @@ message NebulaMeta {
 
 message NebulaMetaDetails {
   uint32 VpnIp = 1;
-  repeated IpAndPort IpAndPorts = 2;
+  repeated Ip4AndPort Ip4AndPorts = 2;
   repeated Ip6AndPort Ip6AndPorts = 4;
   uint32 counter = 3;
 }
 
-message IpAndPort {
+message Ip4AndPort {
   uint32 Ip = 1;
   uint32 Port = 2;
 }