Allow server configuration at runtime

[Wesmania]

Having to restart the server to change it's configurations is really inconvenient (and 10x so once it's in production). We should find some way to edit at least some settings at runtime.

[norraxx]

Decorator on env vars?

[Wesmania]

Which decorator do you have in mind? Also, there's also a question of exposing an interface for changing configuration, and plenty of code needs to be refactored in order to support configuration values that can change.

[norraxx]

I suppose, you have config, and you're taking info from variables, "decorate variables", to have all time actual environment.

Unfortunately you may break come running code, like loop will behave different, so you'll need have config copy per request. Or protect every part of code.