Move jdbc-pool changes for 8.0.11 from modules/jdbc-pool/doc/changelog.xml into main webapps/docs/changelog.xml.
Sort by issue number.

In JDBC Pool changelog file:
- Add a note that this changelog file is obsolete.
- Add XSLT stylesheet reference so that the file is viewable in a web browser (such as Firefox).
- Fix a pair of markup errors.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1617576 13f79535-47bb-0310-9956-ffa450edef68