[jdk11u-dev] RFR: Merge jdk11u:master

[Goetz Lindenmaier]

Merge build tag 11.0.18-ga from jdk11u to jdk11u-dev

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Commit messages:
 - Merge
 - 8299596: [11u] Remove designator DEFAULT_PROMOTED_VERSION_PRE=ea for release 11.0.19
 - 8299129: Enhance NameService lookups
 - 8298667: Improved path handling
 - 8298310: Enhance TLS session negotiation
 - 8298191: Enhance object reclamation process
 - 8297371: Improve UTF8 representation redux
 - 8296832: Improve Swing platform support
 - 8296692: Improve String platform support
 - 8296684: Improve String platform support
 - ... and 5 more: https://git.openjdk.org/jdk11u-dev/compare/2ccf28ed...d99f9931

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1844&range=00.0
 - jdk11u:master: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1844&range=00.1

Changes: https://git.openjdk.org/jdk11u-dev/pull/1844/files
  Stats: 569 lines in 50 files changed: 333 ins; 66 del; 170 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1844.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1844/head:pull/1844

PR: https://git.openjdk.org/jdk11u-dev/pull/1844