Shard is re-identifying therefore the old connection needs to be closed.

Special close code reserved for Discordeno's zero-downtime resharding system.

A resume has been requested and therefore the old connection needs to be closed.

A regular Shard shutdown.

Discordeno's gateway tests hae been finished, therefore the Shard can be turned off.

Did not receive a heartbeat ACK in time. Closing the shard and creating a new session.