Log Message:
Update sun-{jre,jdk}6 to 6.0.20, aka 1.6.0_20.

Changes in 1.6.0_20 (6u20)
* OlsonData 2010b
* A Java Network Launch Protocol (JNLP) file without a codebase parameter, such
  as the following, will no longer work with the Java SE 6 update 20 release.
      <jnlp spec="0.2 1.0" href="draw.jnlp">
  This means that developers must specify the codebase parameter in a JNLP file.
  See the following example:
      <jnlp spec="0.2 1.0"
            \ 
codebase="http://java.sun.com/javase/technologies/desktop/javawebstart/apps/"
            href="draw.jnlp">
* This release contains fixes for security vulnerabilities.
  For more information, please see Oracle Security Alert for CVE-2010-0886

Changes in 1.6.0_19 (6u19)
* OlsonData 2010b
* Root Certificates
* Ensuring Application and Applet Security when Mixing Signed and Unsigned Code
* Interim Fix for the Transport Layer Security (TLS) Man-in-the-Middle Attack
* Bug Fixes

Changes in 1.6.0_18 (6u18)
* OlsonData 2009s
* VisualVM 1.2
* Java DB 10.5.3.0
* Performance Improvements
* Deployment Updates
* JSR-173 StAX 1.2 API Upgrade
* Bug Fixes