Split into two paragraphs, so that note is more visible.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593697 13f79535-47bb-0310-9956-ffa450edef68
Fix broken javadoc links.
Noted when reviewing results of 'ant release' step from buildbot.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593699 13f79535-47bb-0310-9956-ffa450edef68
Remove svn keywords from forked Apache Commons Pool2 and DBCP2

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593700 13f79535-47bb-0310-9956-ffa450edef68