update sysinfo to logrus

Signed-off-by: Victor Vieux <vieux@docker.com>

jsonlog/jsonlog.go

@@ -4,8 +4,9 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
 	"time"
+
+	log "github.com/Sirupsen/logrus"
 )
 
 type JSONLog struct {

proxy/tcp_proxy.go

@@ -2,9 +2,10 @@ package proxy
 
 import (
 	"io"
-	"log"
 	"net"
 	"syscall"
+
+	log "github.com/Sirupsen/logrus"
 )
 
 type TCPProxy struct {

proxy/udp_proxy.go

@@ -2,12 +2,13 @@ package proxy
 
 import (
 	"encoding/binary"
-	"log"
 	"net"
 	"strings"
 	"sync"
 	"syscall"
 	"time"
+
+	log "github.com/Sirupsen/logrus"
 )
 
 const (

sysinfo/sysinfo.go

@@ -2,10 +2,10 @@ package sysinfo
 
 import (
 	"io/ioutil"
-	"log"
 	"os"
 	"path"
 
+	log "github.com/Sirupsen/logrus"
 	"github.com/docker/libcontainer/cgroups"
 )