Initialize singleton cookie specs lazily

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1623733 13f79535-47bb-0310-9956-ffa450edef68
Default and standard cookie specs to use public suffix list when available

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1623734 13f79535-47bb-0310-9956-ffa450edef68