RFR: Merge jdk:master

[Jorn Vernee]

Manual merge of jdk/master into panama-foreign/master to pull in 59a539f

-------------

Commit messages:
 - Merge branch 'jdk_master' into merge_jdk_master
 - 8268129: LibraryLookup::ofDefault leaks symbols from loaded libraries
 - 8265444: Javadocs: jdk.jshell - small typo

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

Changes: https://git.openjdk.java.net/panama-foreign/pull/550/files
  Stats: 1353 lines in 48 files changed: 626 ins; 621 del; 106 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/550.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/550/head:pull/550

PR: https://git.openjdk.java.net/panama-foreign/pull/550