HTTPCLIENT-1320: Leverage javax.net.ssl.SSLSocketFactory#getDefault() to initialize SSL context based on system defaults instead of using an internal custom routine

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/branches/4.2.x@1454686 13f79535-47bb-0310-9956-ffa450edef68