Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56115
Expose the httpusecaches property of Ant's get task as some users may need to change the default.
Based on a suggestion by Anthony. 

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1566693 13f79535-47bb-0310-9956-ffa450edef68
Working off a Commons Pool release again.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1566694 13f79535-47bb-0310-9956-ffa450edef68
Followup to r1566695
Correct typo

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1566699 13f79535-47bb-0310-9956-ffa450edef68