Add details of what example does

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1586797 13f79535-47bb-0310-9956-ffa450edef68
NET-535 IMAP FETCH can overflow reply buffer; provide for partial responses
Add TRUE_CHUNK_LISTENER

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1586800 13f79535-47bb-0310-9956-ffa450edef68
Rewrite to avoid some resource closure warnings caused by reusing the stream variables

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1586804 13f79535-47bb-0310-9956-ffa450edef68