HTTPCLIENT-1517: strip port and optionaly use canonical hostname when creating kerberos / gssapi context
Contributed by Sebastian Brabänder <apache-devel at brabaender-it.de>

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1610401 13f79535-47bb-0310-9956-ffa450edef68