Spring Add WebSocket support to WebFlux Functional API (and Kotlin DSL) [SPR-16770]

Lucas opened SPR-16770 and commented

Allows to implement WebSockets without annotations via WebFlux Functional DSL.

It seems that only HTTP requests can be handled by the router { } block at the moment, but it would be nice to support WS too.

Reference URL: https://kotlinlang.slack.com/archives/C0B8ZTWE4/p1524600160000590