Switch uses of SslSocketConnector to SslSelectChannelConnector so that we can use continuations. Massively improves SparkWeb login times. This also modifies SSLConfig to allow accessing the SSLContext (necessary for the switch), and merges SSLJiveServerSocketFactory into SSLConfig, since it was redundant.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@9096 b35dd754-fafc-0310-a699-88a17e54d16e