RFR: 8252980: comment only changes extracted from JDK-8247281

[Daniel D.Daugherty]

On Wed, 9 Sep 2020 21:08:18 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

> This sub-task is tracking comment only changes extracted
> from Erik's work on JDK-8247281. This extraction is done
> to ease the code review for the JDK-8247281 changes.

This is a trivial review request. This changeset was tested with Mach5 Tier[1-3],4,5,6,7,8
testing along with JDK-8252981 and JDK-8247281.

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PR: https://git.openjdk.java.net/jdk/pull/98