SSLServerSocketAppender has an 'ssl' property of type SSLConfiguration.

This commit adds the new appender and modifies the JoranConfigurator
to include rules for SSL configuration types.

match start of content type so ex: application/x-www-form-urlencoded; charset=UTF-8 matches

upped pom version to 1.0.7-SNAPSHOT

Use locks of type LogbackLock instead of just Object for increased clarity when analysing thread dumps