Thank you for doing this! That RCC patch was holding me back and I didn't realize someone updated it. Just a few small nits, but otherwise looks good!

Spelling police.

I edited my previous comment. Pulseaudio is what what causing trouble, not portaudio. (I always get those two mixed up).

Ship it!

FWIW, I ported this a while back for some other port that flopped and never submitted since it would just be a leaf. Very close to what you did. I'll just add that since we have many users still using portmaster/portupgrade, this will auto-dectect optional dependencies already installed including audio/openal(-soft), audio/pulseaudio, multimedia/libass, multimedia/libva, and textproc/uchardet. All of those probably should be optionified so that the dependencies are registered properly. The regression tests could probably be optionified too. I don't really have a strong opinion on the ones that you have as hard dependencies, so that leaves openal and uchardet to deal with.

deskutils/plasma-applet-daisy fixed in https://reviews.freebsd.org/rP437186
deskutils/plasma-applet-yawp fixed in https://reviews.freebsd.org/rP437187

deskutils/plasma-applet-daisy won't actually link to the taskmanager library because find_package(KDE4Workspace REQUIRED) is needed to define ${KDE4WORKSPACE_TASKMANAGER_LIBRARY}. It will build and link, but will cause a crash of plasma-desktop on startup. I already have fixes for deskutils/plasma-applet-daisy and deskutils/plasma-applet-yawp that add some missing dependencies and license updates as well, so please leave those to me.