Add support for deploying to the Zyxel GS1900 line of switches as long
as those switches are running at least firmware V2.80.
Tested on a Zyxel GS1900-8 and GS1900-24E
Resolves#5042
Since the server in mainland China cannot connect to Telegram, add the TELEGRAM_BOT_URLBASE environment variable
Please add the proxy address you set. If this variable is not added, it will be the default value (https://api.telegram.org)