Thread-local actors that are !Send

[Restioson]

This would probably require a LocalAddress struct in the outward facing api, as well as LocalAddressWeak.

[Restioson]

I'm reconsidering this feature, actually. Its implementation would be easy, but require a lot of unsatisfying duplication in the code. If anyone actually wants this (or has a suggestion on how to implement it without duplicating too much code), I would be willing to implement it. Closing for now.

[Restioson]

So it turns out that this is actually possible! I tracked down the issue and now non-Send actors are in the works! No support for non-send messages though ...yet?

[Restioson]

Nope, it would need duplication unless we can have the type Fut<'a> = Box<dyn ...> in message_envelope.rs have a variable Send bound. :(