diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 00000000..c3046cbd
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1 @@
+Please Move to https://github.com/v2fly/v2ray-core/pulls
diff --git a/app/stats/stats.go b/app/stats/stats.go
index 7bb56b28..fc9684d6 100644
--- a/app/stats/stats.go
+++ b/app/stats/stats.go
@@ -184,3 +184,4 @@ func (m *Manager) Start() error {
 func (m *Manager) Close() error {
 	return nil
 }
+
diff --git a/features/stats/stats.go b/features/stats/stats.go
index 2a0acec2..6ac0da26 100644
--- a/features/stats/stats.go
+++ b/features/stats/stats.go
@@ -38,6 +38,7 @@ type Manager interface {
 
 	// RegisterCounter registers a new counter to the manager. The identifier string must not be empty, and unique among other counters.
 	RegisterCounter(string) (Counter, error)
+	UnregisterCounter(string) error
 	// GetCounter returns a counter by its identifier.
 	GetCounter(string) Counter
 
@@ -87,6 +88,11 @@ func (NoopManager) RegisterCounter(string) (Counter, error) {
 	return nil, newError("not implemented")
 }
 
+// UnregisterCounter implements Manager.
+func (NoopManager) UnregisterCounter(string) error {
+	return newError("not implemented")
+}
+
 // GetCounter implements Manager.
 func (NoopManager) GetCounter(string) Counter {
 	return nil
diff --git a/proxy/http/server.go b/proxy/http/server.go
index f956438c..2999a40e 100644
--- a/proxy/http/server.go
+++ b/proxy/http/server.go
@@ -111,7 +111,7 @@ Start:
 	if len(s.config.Accounts) > 0 {
 		user, pass, ok := parseBasicAuth(request.Header.Get("Proxy-Authorization"))
 		if !ok || !s.config.HasAccount(user, pass) {
-			return common.Error2(conn.Write([]byte("HTTP/1.1 407 Proxy Authentication Required\r\nProxy-Authenticate: Basic realm=\"proxy\"\r\n\r\n")))
+			return common.Error2(conn.Write([]byte("HTTP/1.1 407 Proxy Authentication Required\r\nProxy-Authenticate: Basic realm=\"proxy\"\r\nConnection: close\r\n\r\n")))
 		}
 		if inbound != nil {
 			inbound.User.Email = user
diff --git a/proxy/vmess/validator.go b/proxy/vmess/validator.go
index e308255b..0bb67854 100644
--- a/proxy/vmess/validator.go
+++ b/proxy/vmess/validator.go
@@ -190,13 +190,12 @@ func (v *TimedUserValidator) Remove(email string) bool {
 	v.Lock()
 	defer v.Unlock()
 
-	email = strings.ToLower(email)
 	idx := -1
-	for i, u := range v.users {
-		if strings.EqualFold(u.user.Email, email) {
+	for i := range v.users {
+		if strings.EqualFold(v.users[i].user.Email, email) {
 			idx = i
 			var cmdkeyfl [16]byte
-			copy(cmdkeyfl[:], u.user.Account.(*MemoryAccount).ID.CmdKey())
+			copy(cmdkeyfl[:], v.users[i].user.Account.(*MemoryAccount).ID.CmdKey())
 			v.aeadDecoderHolder.RemoveUser(cmdkeyfl)
 			break
 		}