Fix broken link to comments.html page when the directory of the docs is not "tomcat-x.x-doc", as reported on the users list.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1526460 13f79535-47bb-0310-9956-ffa450edef68
Fix broken link to HTTP connector in the Proxy HowTo, as reported on the users list.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1526469 13f79535-47bb-0310-9956-ffa450edef68