(13) RFR(XS): 8226596: Accessibility errors in jdwp-protocol.html

[serguei.spit...@oracle.com]

Please, review a doc issue fix for:   https://bugs.openjdk.java.net/browse/JDK-8226596 Webrev:   http://cr.openjdk.java.net/~sspitsyn/webrevs/2019/8226596-jdwp-a11y.1/ The updated JDWP protocol page:   http://cr.openjdk.java.net/~sspitsyn/webrevs/2019/jdwp-protocol.html Summary:   The change is to replace the 'navigation' attribute with the <nav> element.   With this fix, the Axe reports one issue only:     "Page must contain a level one heading".    I'm not sure what to do to workaround this.    The page was not initially designed to have a level one heading.    It has to be normally used in the context of enclosed page which haswith a level one heading. Testing:   Verified with the Axe plugin (add-on) for Mozilla Firefox browser.   Asked Alex M. to double-check this, and his Axe reported no errors. Thanks, Serguei