We need to review the classes for this in Undertow, some were moved to Elytron, and update the documentation accordingly.

No classes should be removed, and the classes are useful for standalone users that don't use Elytron. That being said, I need to do some background investigation to have a full picture and decide what to do.

See this dicussion in Google Groups: https://groups.google.com/d/msgid/undertow-dev/CALbQ1ontb9qrd4o-nVpdV_pugDcn58vKC8wR2Wk%3D8La%2BC5tzdA%40mail.gmail.com?utm_medium=email&utm_source=footer