RFR: Merge jdk8u:master

[Andrew John Hughes]

Merge `jdk8u482-b08` / `jdk8u482-ga`

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Commit messages:
 - Merge jdk8u482-b08
 - 8368032: Enhance Certificate Checking
 - 8365271: Improve Swing supports
 - 8365058: Enhance CopyOnWriteArraySet
 - 8364214: Enhance polygon data support
 - 8362632: Improve HttpServer Request handling
 - 8362308: Enhance Bitmap operations
 - 8359501: Enhance Handling of URIs
 - 8364660: ClassVerifier::ends_in_athrow() should be removed
 - 8341496: Improve JMX connections
 - ... and 1 more: https://git.openjdk.org/shenandoah-jdk8u/compare/4ce8b293...9d202e63

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah-jdk8u/pull/122/files
  Stats: 1548 lines in 38 files changed: 1192 ins; 271 del; 85 mod
  Patch: https://git.openjdk.org/shenandoah-jdk8u/pull/122.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk8u.git pull/122/head:pull/122

PR: https://git.openjdk.org/shenandoah-jdk8u/pull/122