add warning for non validators to update to mtc2

mytoncore.py

@@ -2677,6 +2677,15 @@ def GetValidatorsList(self, past=False):
 		return validators
 	#end define
 
+	def find_myself_in_vl(self):
+		current_vl = self.GetValidatorsList()
+		past_vl = self.GetValidatorsList(past=True)
+		my_adnl = self.GetAdnlAddr()
+		for validator in current_vl + past_vl:
+			if validator["adnlAddr"] == my_adnl:
+				return True
+		return False
+
 	def CheckValidators(self, start, end):
 		local.add_log("start CheckValidators function", "debug")
 		electionId = start

mytonctrl.py

@@ -109,7 +109,8 @@ def Init(argv):
 #end define
 
 def PreUp():
-	CheckMytonctrlUpdate()
+	CheckMytonctrlUpdate()  # check mtc current branch update only if there wasnt warning about mtc2
+	CheckMytonctrl2Update()
 	CheckDiskUsage()
 	check_vport()
 	# CheckTonUpdate()
@@ -229,6 +230,17 @@ def CheckMytonctrlUpdate():
 #end define
 
 
+def CheckMytonctrl2Update():
+	try:
+		if not ton.find_myself_in_vl():  # we are not validator in current and prev rounds
+			print('============================================================================================')
+			color_print(local.translate("update_mtc2_warning"))
+			print('============================================================================================')
+	except Exception as err:
+		print(f'Failed to check node as validator: {err}')
+# end define
+
+
 def CheckDiskUsage():
 	usage = ton.GetDbUsage()
 	if usage > 90:

translate.json

@@ -369,6 +369,11 @@
 		"ru": "{green}Доступно обновление MyTonCtrl. {red}Пожалуйста, обновите его с помощью команды `update`.{endc}",
 		"zh_TW": "{green}MyTonCtrl 有可用更新. {red}請使用 `update` 命令進行更新.{endc}"
 	},
+	"update_mtc2_warning": {
+		"en": "{red} If you are not a validator and using node only as liteserver, update to the MyTonCtrl2.0: `update mytonctrl2`. After updating turn \"liteserver\" mode on: `disable_mode validator`; `enable_mode liteserver` {endc}",
+		"ru": "{red} Если вы не валидатор и используете ноду только как лайтсервер, обновитесь до MyTonCtrl2.0: `update mytonctrl2`. После обновления включите режим \"Лайтсервера\": `disable_mode validator`; `enable_mode liteserver` {endc}",
+		"zh_TW": "{red} 如果您不是驗證者，僅將節點用作 liteserver，更新到 MyTonCtrl2.0: `update mytonctrl2`。更新後，將 \"liteserver\" 模式打開: `disable_mode validator`; `enable_mode liteserver` {endc}"
+	},
 	"disk_usage_warning": {
 		"en": "{red} Disk is almost full, clean the TON database immediately: https://docs.ton.org/participate/nodes/node-maintenance-and-security#database-grooming {endc}",
 		"ru": "{red} Диск почти заполнен, немедленно очистите базу данных TON: https://docs.ton.org/participate/nodes/node-maintenance-and-security#database-grooming {endc}",