HADOOP-15832. Addendum: Upgrade BouncyCastle to 1.60. Contributed by Robert Kanter

README.txt

@@ -29,3 +29,5 @@ The following provides more details on the included cryptographic
 software:
   Hadoop Core uses the SSL libraries from the Jetty project written 
 by mortbay.org.
+  Hadoop Yarn Server Web Proxy uses the BouncyCastle Java
+cryptography APIs written by the Legion of the Bouncy Castle Inc.