master
8212662: Fix javadoc typo in java.lang.ref.Cleaner
8256517: (ref) Reference.clear during reference processing may lose notification 8240696: (ref) Reference.clear may extend the lifetime of the referent
8266459: Implement JEP 411: Deprecate the Security Manager for Removal
8187443: Forest Consolidation: Move files to unified layout
8271862: C2 intrinsic for Reference.refersTo() is often not used
8203327: Small cleanups in java.lang.ref