Serialize given -> real addr mapping.

service.go

@@ -14,6 +14,7 @@ func Relaunch() error {
 	env := &fdenv{
 		Sockets:   make([]*fdencode, 0),
 		ParentPID: os.Getpid(),
+		Addrs:     make(map[string]string),
 	}
 
 	files, err := fds.Files()
@@ -24,6 +25,7 @@ func Relaunch() error {
 	for _, file := range files {
 		env.Sockets = append(env.Sockets, &fdencode{file.fp.Name(), file.fd})
 	}
+	env.Addrs = fds.addrmap
 
 	buf, _ := json.Marshal(env)
 	cwd, _ := os.Getwd()