frozen 2019 but not completely

[Karl Berry]

TL users - although you may have noticed that tlmgr started emitting the
"frozen" message with last night's update, in fact, a couple more
critical updates will be forthcoming, both after tonight and in another
day or two. All related to the (necessary) LaTeX update that happened
last night.

Any such updates should still get installed normally, despite tlmgr
reporting that it's frozen. (It's just a message, not the reality. :)

I will not be routinely importing every CTAN update to TL2019 any more,
however. The pretest should be ready to roll in a few days. --best, karl.