Parsing of excludePattern breaks regex

See buildExcludedPatternsList() in http://svn.apache.org/repos/asf/struts/struts2/trunk/core/src/main/java/org/apache/struts2/dispatcher/ng/InitOperations.java

It simply splits on commas, making it impossible to write regex like "/products/[0-9]{1,10}.json" as this will be split in two.

Please supply a way to escape commas by sticking a \ in front or something like that.