Update Amazon RDS certificates

closes mysqljs#1001
closes mysqljs#1003
closes mysqljs#1004

Author: dougwilson

Changes.md

@@ -8,6 +8,7 @@ you spot any mistakes.
 
 * Store SSL presets in JS instead of JSON #959
 * Support Node.js 0.12
+* Update Amazon RDS SSL certificates #1001
 
 ## v2.5.4 (2014-12-16)
 

Readme.md

@@ -242,7 +242,8 @@ The `ssl` option in the connection options takes a string or an object. When giv
 it uses one of the predefined SSL profiles included. The following profiles are included:
 
 * `"Amazon RDS"`: this profile is for connecting to an Amazon RDS server and contains the
-  ca from https://rds.amazonaws.com/doc/rds-ssl-ca-cert.pem
+  certificates from https://rds.amazonaws.com/doc/rds-ssl-ca-cert.pem and
+  https://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem
 
 When connecting to other servers, you will need to provide an object of options, in the
 same format as [crypto.createCredentials](http://nodejs.org/api/crypto.html#crypto_crypto_createcredentials_details).