Retain the order the URLs were added in when calculating the result for getURLs()

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593282 13f79535-47bb-0310-9956-ffa450edef68
Update changelog

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593284 13f79535-47bb-0310-9956-ffa450edef68
Update changelog

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1593290 13f79535-47bb-0310-9956-ffa450edef68