HEADS-UP: JBS fix versions changing on Feb 28 from "openjfxNN" to "jfxNN"

[Kevin Rushforth]

If you run JBS queries to find or filter out JavaFX bugs, please read 
this. Otherwise, you can ignore this.

The unbundled JavaFX versions (11 and later) in JBS follow the pattern 
"openjfxNN[.0.MM]". We intend to globally rename all of the JavaFX fix 
versions in JBS from "openjfxNN[.0.MM]" to "jfxNN[.0.MM]". You will need 
to update any JBS queries that either reference an explicit "openjfxNN" 
version or use "openjfx" as part of a regex to use "jfx" instead.

For example:

openjfx21 --> jfx21
openjfx20 --> jfx20
openjfx17.0.7 --> jfx17.0.7
openjfx11.0.19 --> jfx11.0.19
...

The planned cut-over date is Tuesday, Feb 28. As part of this, I filed 
JDK-8302470 [1] to update the JBS version field in .jcheck/conf. I will 
prepare PRs for all active code lines and integrate them immediately 
after the JBS version renaming is done.

NOTE: this change only affects JBS fix versions. There is no change or 
impact at all to those developing or using JavaFX.

-- Kevin

[1] https://bugs.openjdk.org/browse/JDK-8302470