Update changelog for BZ 47919 per r1630407
It logs not just key env vars, but all of them, and logs command line arguments.
I am emphasizing CATALINA_OPTS, JAVA_OPTS, as that may be a security concern for somebody.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1633346 13f79535-47bb-0310-9956-ffa450edef68