HEADS UP: Wayland and WebRTC enabled for NetBSD 9/Linux

[nia <nia%NetBSD.org@localhost>]

Hi,

This is just a heads up that the Wayland option is now turned on by
default for NetBSD 9 and Linux in cases where it peacefully coexists
with X11.

Right now, this effects the following packages:

* graphics/MesaLib
* devel/SDL2
* www/webkit-gtk
* x11/gtk3

The WebRTC option has also been enabled by default on NetBSD 9 for two
Firefox versions:

* www/firefox
* www/firefox68

Please keep me informed of any fallout. Hopefully, there will be none.

If you want to try out Wayland-related things on NetBSD 9, wm/velox/MESSAGE
may be interesting for you.