[jdk11u-dev] RFR: Merge jdk11u:master

[Andrew John Hughes]

Merge jdk-11.0.27-ga

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Commit messages:
 - Merge jdk11u:master
 - 8354087: [11u] Remove designator DEFAULT_PROMOTED_VERSION_PRE=ea for release 11.0.27
 - 8347847: Enhance jar file support
 - 8343007: Enhance Buffered Image handling
 - 8342562: Enhance Deflater operations
 - 8338430: Improve compiler transformations
 - 8337692: Better TLS connection support
 - 8339810: Clean up the code in sun.tools.jar.Main to properly close resources and use ZipFile during extract
 - 8309841: Jarsigner should print a warning if an entry is removed
 - 8337494: Clarify JarInputStream behavior

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3023&range=00.0
 - jdk11u:master: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3023&range=00.1

Changes: https://git.openjdk.org/jdk11u-dev/pull/3023/files
  Stats: 304 lines in 12 files changed: 226 ins; 25 del; 53 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3023.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3023/head:pull/3023

PR: https://git.openjdk.org/jdk11u-dev/pull/3023