RFR: 8247957: remove doclint support for HTML 4 [v2]

Tue Dec 15 07:30:59 UTC 2020

On Fri, 11 Dec 2020 06:44:57 GMT, Yoshiki Sato <ysatowse at openjdk.org> wrote:

>> Please make the review non-draft as well
>
> Thanks for reviewing @jonathan-gibbons 
> This request should have got changed to "non-draft".
> 
> FYI. all tests in jdk-tier1 are still green with the latest changes.
> https://mach5.us.oracle.com/mdash/jobs/yoshiki-jdk-20201211-0555-16616611

This commit includes the changes for 
8257204: Remove usage of -Xhtmlversion option from javac
8256313: JavaCompilation.gmk needs to be updated not to use --doclint-format html5 option

The changes presume the changes made by a 8247957.   And there is no need to separate them from 8247957, so I would like to pull all changes into this.

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PR: https://git.openjdk.java.net/jdk/pull/893