Update release notes to actually reflect OpenJDK 18 and subsequent releases 18.0.1 & 18.0.1.1
Print release file during build, which should now include a correct SOURCE value from .src-rev
Update tarball script with IcedTea GitHub URL and .src-rev generation
Include script to generate bug list for release notes
Update tzdata requirement to 2022a to match JDK-8283350
