https://issues.apache.org/bugzilla/show_bug.cgi?id=56365
Document file name pattern syntax for StandardJarScanner.
When configuring pattern lists: be tolerant of leading/trailing whitespace, ignore empty patterns.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1590387 13f79535-47bb-0310-9956-ffa450edef68