Fix standalone javadoc generation in jdbc-pool using "javadoc" task in build.xml of jdbc-pool.
I doubt anyone uses it. Usually javadocs for the pool are generated from Tomcat-wide <javadoc> task in Tomcat's main build.xml file.

There is a trick: jdbc-pool.xml is transformed into package.html file.
Javadoc tool cannot parse the generated package.html if the page has complex headers, footers, HTML comments.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1634326 13f79535-47bb-0310-9956-ffa450edef68