diff --git a/build b/build
index d7e31991..c07e5eac 100755
--- a/build
+++ b/build
@@ -1,11 +1,25 @@
 #!/bin/sh
+while getopts ud option
+do
+  case "${option}"
+  in
+  u) UPX=true;;
+  d) DEBUG=true;;
+  esac
+done
 export GOPATH=$PWD
 echo "Downloading..."
 go get -d -v
 go get -d -v yggdrasil
 for file in *.go ; do
   echo "Building: $file"
-  go build $@ $file
-  #go build -ldflags="-s -w" -v $file
-  #upx --brute ${file/.go/}
+  #go build $@ $file
+  if [ $DEBUG ]; then
+    go build -tags debug -v $file
+  else
+    go build -ldflags="-s -w" -v $file
+  fi
+  if [ $UPX ]; then
+    upx --brute ${file%.go}
+  fi
 done
diff --git a/contrib/config/yggdrasilconf.go b/contrib/config/yggdrasilconf.go
new file mode 100644
index 00000000..bc6e1326
--- /dev/null
+++ b/contrib/config/yggdrasilconf.go
@@ -0,0 +1,97 @@
+package main
+
+/*
+This is a small utility that is designed to accompany the vyatta-yggdrasil
+package. It takes a HJSON configuration file, makes changes to it based on
+the command line arguments, and then spits out an updated file.
+*/
+
+import (
+	"bytes"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"strconv"
+
+	"github.com/neilalexander/hjson-go"
+	"golang.org/x/text/encoding/unicode"
+
+	"yggdrasil/config"
+)
+
+type nodeConfig = config.NodeConfig
+
+func main() {
+	useconffile := flag.String("useconffile", "/etc/yggdrasil.conf", "update config at specified file path")
+	flag.Parse()
+	cfg := nodeConfig{}
+	var config []byte
+	var err error
+	config, err = ioutil.ReadFile(*useconffile)
+	if err != nil {
+		panic(err)
+	}
+	if bytes.Compare(config[0:2], []byte{0xFF, 0xFE}) == 0 ||
+		bytes.Compare(config[0:2], []byte{0xFE, 0xFF}) == 0 {
+		utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
+		decoder := utf.NewDecoder()
+		config, err = decoder.Bytes(config)
+		if err != nil {
+			panic(err)
+		}
+	}
+	var dat map[string]interface{}
+	if err := hjson.Unmarshal(config, &dat); err != nil {
+		panic(err)
+	}
+	confJson, err := json.Marshal(dat)
+	if err != nil {
+		panic(err)
+	}
+	json.Unmarshal(confJson, &cfg)
+	switch flag.Arg(0) {
+	case "setMTU":
+		cfg.IfMTU, err = strconv.Atoi(flag.Arg(1))
+		if err != nil {
+			cfg.IfMTU = 1280
+		}
+		if mtu, _ := strconv.Atoi(flag.Arg(1)); mtu < 1280 {
+			cfg.IfMTU = 1280
+		}
+	case "setIfName":
+		cfg.IfName = flag.Arg(1)
+	case "setListen":
+		cfg.Listen = flag.Arg(1)
+	case "setAdminListen":
+		cfg.AdminListen = flag.Arg(1)
+	case "setIfTapMode":
+		if flag.Arg(1) == "true" {
+			cfg.IfTAPMode = true
+		} else {
+			cfg.IfTAPMode = false
+		}
+	case "addPeer":
+		found := false
+		for _, v := range cfg.Peers {
+			if v == flag.Arg(1) {
+				found = true
+			}
+		}
+		if !found {
+			cfg.Peers = append(cfg.Peers, flag.Arg(1))
+		}
+	case "removePeer":
+		for k, v := range cfg.Peers {
+			if v == flag.Arg(1) {
+				cfg.Peers = append(cfg.Peers[:k], cfg.Peers[k+1:]...)
+			}
+		}
+	}
+	bs, err := hjson.Marshal(cfg)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(string(bs))
+	return
+}
diff --git a/src/yggdrasil/debug.go b/src/yggdrasil/debug.go
index 2cf90401..f95bfa3d 100644
--- a/src/yggdrasil/debug.go
+++ b/src/yggdrasil/debug.go
@@ -20,6 +20,20 @@ import "regexp"
 import _ "net/http/pprof"
 import "net/http"
 import "runtime"
+import "os"
+
+// Start the profiler in debug builds, if the required environment variable is set.
+func init() {
+	envVarName := "PPROFLISTEN"
+	hostPort := os.Getenv(envVarName)
+	switch {
+	case hostPort == "":
+		fmt.Printf("DEBUG: %s not set, profiler not started.\n", envVarName)
+	default:
+		fmt.Printf("DEBUG: Starting pprof on %s\n", hostPort)
+		go func() { fmt.Println(http.ListenAndServe(hostPort, nil)) }()
+	}
+}
 
 // Starts the function profiler. This is only supported when built with
 // '-tags build'.
diff --git a/src/yggdrasil/release.go b/src/yggdrasil/release.go
deleted file mode 100644
index 3b136904..00000000
--- a/src/yggdrasil/release.go
+++ /dev/null
@@ -1,14 +0,0 @@
-// +build !debug
-
-package yggdrasil
-
-import (
-	"errors"
-	"log"
-)
-
-// Starts the function profiler. This is only supported when built with
-// '-tags build'.
-func StartProfiler(_ *log.Logger) error {
-	return errors.New("Release builds do not support -pprof, build using '-tags debug'")
-}
diff --git a/src/yggdrasil/tcp.go b/src/yggdrasil/tcp.go
index 5408b6bf..db57b568 100644
--- a/src/yggdrasil/tcp.go
+++ b/src/yggdrasil/tcp.go
@@ -17,6 +17,7 @@ package yggdrasil
 import (
 	"errors"
 	"fmt"
+	"math/rand"
 	"net"
 	"sync"
 	"sync/atomic"
@@ -112,6 +113,7 @@ func (iface *tcpInterface) call(saddr string, socksaddr *string) {
 			defer func() {
 				// Block new calls for a little while, to mitigate livelock scenarios
 				time.Sleep(tcp_timeout)
+				time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
 				iface.mutex.Lock()
 				delete(iface.calls, saddr)
 				iface.mutex.Unlock()
diff --git a/yggdrasil.go b/yggdrasil.go
index d29c65b7..20b4aa08 100644
--- a/yggdrasil.go
+++ b/yggdrasil.go
@@ -82,7 +82,6 @@ func doGenconf() string {
 // The main function is responsible for configuring and starting Yggdrasil.
 func main() {
 	// Configure the command line parameters.
-	pprof := flag.Bool("pprof", false, "Run pprof, see http://localhost:6060/debug/pprof/")
 	genconf := flag.Bool("genconf", false, "print a new config to stdout")
 	useconf := flag.Bool("useconf", false, "read config from stdin")
 	useconffile := flag.String("useconffile", "", "read config from specified file path")
@@ -203,12 +202,6 @@ func main() {
 	}
 	// Create a new logger that logs output to stdout.
 	logger := log.New(os.Stdout, "", log.Flags())
-	// If the -pprof flag was provided then start the pprof service on port 6060.
-	if *pprof {
-		if err := yggdrasil.StartProfiler(logger); err != nil {
-			logger.Println(err)
-		}
-	}
 	// Setup the Yggdrasil node itself. The node{} type includes a Core, so we
 	// don't need to create this manually.
 	n := node{}