Update release notes for 8u282-b01.
Switch to EA mode.
Remove PR3601, covered upstream by JDK-8062808.
Remove upstreamed JDK-8197981/PR3548, JDK-8062808/PR3548 & JDK-8254177.
Extend RH1750419 alt-java fix to include external debuginfo, following JDK-8252395
Adapt JDK-8143245 patch, following JDK-8254166
Switch to EA mode.
Adjust JDK-8143245/PR3548 patch following context changes due to JDK-8203287 for JFR
Adjust RH1648644 following context changes due to introduction of JFR packages
Add jfr binary to devel package and alternatives set
Drop 8210425 patches applied upstream. Still need to add AArch64 version in aarch64/shenandoah-jdk8u.
Re-generate JDK-8141570 & JDK-8143245 patches due to 8210425 zeroshark.make changes.