As the first step to remove the system properties, sun.security.ssl.allowUnsafeRenegotiation and sun.security.ssl.allowLegacyHelloMessages, need to update JSSE Reference Guides and declare that the properties would be deprecated in JDK 9 and removed in next JDK release (JDK 10).

The Oracle Review Link:
http://review.us.oracle.com/review2/Review.html#reviewId=277252;scope=review;status=open,fixed;documentId=1163898;matchType=any;matchValue=787566616e