Integrated: Merge valhalla:master

[Dan Smith]

Merge from tag jdk-16+27

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Commit messages:
 - Merge tag 'jdk-16+27' into jep390-merge/jdk-16+27
 - 8256818: SSLSocket that is never bound or connected leaks socket resources
 - 8257189: Handle concurrent updates of MH.form better
 - 8257565: epsilonBarrierSet.hpp should not include barrierSetAssembler
 - 8256256: UL should not use heap allocation for output string
 - 8257140: Crash in JvmtiTagMap::flush_object_free_events()
 - 8253916: ResourceExhausted/resexhausted001 crashes on Linux-x64
 - 8254877: GCLogPrecious::_lock rank constrains what locks you are allowed to have when crashing
 - 8256382: Use try_lock for hs_err EventLog printing
 - 8257533: legacy-jre-image includes jpackage and jlink tools
 - ... and 252 more: https://git.openjdk.java.net/valhalla/compare/54ba37be...de7f27b0

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - jep390: https://webrevs.openjdk.java.net/?repo=valhalla&pr=295&range=00.0
 - valhalla:master: https://webrevs.openjdk.java.net/?repo=valhalla&pr=295&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/295/files
  Stats: 209295 lines in 1490 files changed: 136159 ins; 52121 del; 21015 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/295.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/295/head:pull/295

PR: https://git.openjdk.java.net/valhalla/pull/295