Javadoc

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1644081 13f79535-47bb-0310-9956-ffa450edef68
Corrected handling of cookie attributes with null value

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1644165 13f79535-47bb-0310-9956-ffa450edef68
HTTPCLIENT-1588: code optimization

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1644166 13f79535-47bb-0310-9956-ffa450edef68