added SSLSocketAppenderBase to core
added SSLSocketAppender to classic

In addition to the new SSLSocketAppender class, the
DefaultNestedComponentRules is include to allow SSL configuration
types used by the appender.
added SSLSocketAppender to access

In addition to the new appender class, the JoranConfigurator is
modified to include SSL configuration types used by the appender.
added SimpleSSLSocketServer to classic

The existing SimpleSocketServer is modified so that its startup
logic can be reused by the new server.
added documentation for SSLSocketAppender to the manual
added documentation for SSL configuration options