Attempt to obfuscate session cookie values associated with other web applications when viewing HTTP request headers with the Request Header example from the examples web application. This reduces the opportunity to use this example for malicious purposes should the advice to remove the examples web application from security sensitive systems be ignored.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1602831 13f79535-47bb-0310-9956-ffa450edef68