Remove bot token from debug stream

[jacklul]

This will remove bot token from debug http log streams, specifically from the URL path, I don't think there is any other place the token shows up?

So this:

> POST /bot123456789:AAHc2FVEadqyhkTYcUuG1RiYR4Hfgpwc/sendMessage HTTP/1.1

becomes this:

> POST /botBOT_TOKEN_REMOVED/sendMessage HTTP/1.1

Can be disabled on demand with TelegramLog::$remove_bot_token = false.
Having it enabled as default will make it safe for the people to post these logs for troubleshooting.

Regex is literally modified one from Telegram.php:172.
My original idea was to cache the token in the class to not run regex for each entry but people might be running some weird setups where they handle multiple bots in single script.

[noplanman]

Thanks for the PR 👍

I agree with not caching the token, as that would also just add an extra variable somewhere.
Also, as this code is only executed when a request fails, it should be fine regarding performance.

[noplanman]

I added a short note about the new variable to the docs.