RFR: 8262893: Enable more doclint checks in javadoc build

[Joe Darcy]

With recent cleanups, several doclint categories have been cleared across the JDK and should be enabled in the javadoc build to make sure they stay clean.

Local docs build completes with this stricter set of checks.

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Commit messages:
 - 8262893: Enable more doclint checks in javadoc build

Changes: https://git.openjdk.java.net/jdk/pull/2799/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2799&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8262893
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2799.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2799/head:pull/2799

PR: https://git.openjdk.java.net/jdk/pull/2799