RFR: Request to sync April 2020 CPU changes into jfx

[Kevin Rushforth]

Johan and Phil,

I request approval to sync changes from to the just-released April 2020 
CPU release into the 'master' branch of the 'jfx' repo. Here is the 
aggregate set of changes for the fixes:

https://github.com/kevinrushforth/jfx/compare/4d69a0d...cpu-2004-sync

NOTE: Since this is an integration of already-reviewed fixes into the 
jfx repo, I will push it directly into the master branch rather than via 
a pull request.

-- Kevin