Introduce user level

proxy/vmess/config/user.go

@@ -1,5 +1,27 @@
 package config
 
+type UserLevel int
+
+const (
+  UserLevelAdmin = UserLevel(999)
+  UserLevelUntrusted = UserLevel(0)
+)
+
 type User interface {
 	ID() *ID
+  Level() UserLevel
+}
+
+type UserSettings struct {
+  PayloadReadTimeout int
+}
+
+func GetUserSettings(level UserLevel) UserSettings {
+  settings := UserSettings {
+    PayloadReadTimeout: 120,
+  }
+  if level > 0 {
+    settings.PayloadReadTimeout = 0
+  }
+  return settings
 }