Removed `PrivateKeyUsagePeriod` from method javadoc and added several commonly used extensions
------------- Commit messages: - removed PrivateKeyUsagePeriod from table and added several other commonly used extensions Changes: https://git.openjdk.org/jdk/pull/18565/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18565&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8328318 Stats: 8 lines in 1 file changed: 6 ins; 2 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/18565.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18565/head:pull/18565 PR: https://git.openjdk.org/jdk/pull/18565
