Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55383
Improve markup and design of Tomcat Native documentation.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/native/trunk@1532577 13f79535-47bb-0310-9956-ffa450edef68
Follow-Up to r1532577:
Use an explicitely defined anchor for news items.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/native/trunk@1532582 13f79535-47bb-0310-9956-ffa450edef68