HTTPCLIENT-1575: HttpRoute constructor to resolve default target port (-1) based on standard scheme port convention (http -> 80, https -> 443); to be removed in 5.0

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1639698 13f79535-47bb-0310-9956-ffa450edef68