[jdk11u-dev] RFR: Merge jdk11u:master

[Goetz Lindenmaier]

Merge build tag 11.0.17+6 from jdk11u to jdk11u-dev

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Commit messages:
 - Merge
 - 8275887: jarsigner prints invalid digest/signature algorithm warnings if keysize is weak/disabled

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

Changes: https://git.openjdk.org/jdk11u-dev/pull/1365/files
  Stats: 125 lines in 9 files changed: 42 ins; 30 del; 53 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1365.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1365/head:pull/1365

PR: https://git.openjdk.org/jdk11u-dev/pull/1365