[jdk8u-dev] RFR: Merge jdk8u:master

[Andrew John Hughes]

Sync jdk8u402-b06

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Commit messages:
 - Merge
 - 8317547: Enhance TLS connection support
 - 8316976: Improve signature handling
 - 8314468: Improve Compiler loops
 - 8314307: Improve loop handling
 - 8314295: Enhance verification of verifier
 - 8314284: Enhance Nashorn performance
 - 8308204: Enhanced certificate processing
 - 8320597: RSA signature verification fails on signed data that does not encode params correctly
 - 8302017: Allocate BadPaddingException only if it will be thrown

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

Changes: https://git.openjdk.org/jdk8u-dev/pull/421/files
  Stats: 690 lines in 15 files changed: 485 ins; 89 del; 116 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/421.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/421/head:pull/421

PR: https://git.openjdk.org/jdk8u-dev/pull/421