Option to disable message read limit completely

[SoMuchForSubtlety]

I do not want to limit the size of possible messages. Currently, the only way to do this is to set the read limit to a very high number. Would it be possible to add an option to completely disable the limit?

[gnvk]

@nhooyr Can you please share your thoughts on this one?

[nhooyr]

Sounds good, will make -1 do this.

[gnvk]

Great, thanks! Looking forward to it.

[nhooyr]

Done in dev.