[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-16+27'

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Commit messages:
 - Logical merge fixes for compilation
 - Merge tag 'jdk-16+27' into lworld_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
 - ... and 109 more: https://git.openjdk.java.net/valhalla/compare/c08bc913...fe42dcfb

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=290&range=00.0
 - jdk: https://webrevs.openjdk.java.net/?repo=valhalla&pr=290&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/290/files
  Stats: 25036 lines in 607 files changed: 13883 ins; 3564 del; 7589 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/290.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/290/head:pull/290

PR: https://git.openjdk.java.net/valhalla/pull/290