(bugfix) broadcast bans to other servers

Fixes a bug where the bot sent all the ban notifications to the server that initiated the ban, rather than to the proper destination servers.

This is what I get for testing on only one server.

Broadcast unbans

The bot now broadcasts to other servers when a user is unbanned. This was added to help undo the damage done by accidental bans.
Unban broadcasts follow all the same rules as the existing ban broadcast functionality.

This also fixes an (unlikely) issue where the ban button would incorrectly report that a user had already been banned when they weren't if the bot's internal ban storage falls out of sync with Discord. In practice, this would only really happen if a ban went out while the bot was offline.

Server whitelisting

Previously the bot was set to private, meaning only the owner could invite it. This isn't great, but the alternative was setting the bot to public and hoping nobody would add it, which is much worse.

This release adds a whitelist, meaning any server that wants to use the bot must be explicitly whitelisted by the bot owner.

Initial release

v1.0.0

1.0.0