Partial fix for https://issues.apache.org/bugzilla/show_bug.cgi?id=55620 Prevent Tomcat from starting on Linux when CATALINA_HOME or CATALINA_BASE contains a colon

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1530916 13f79535-47bb-0310-9956-ffa450edef68
Update the change log.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1530918 13f79535-47bb-0310-9956-ffa450edef68