Review the possibility of using OWASP Sanitizer in FormattedServiceListWriter

https://www.owasp.org/index.php/OWASP_Java_HTML_Sanitizer_Project project (and related projects) offer a number of ways to protect against XSS.

Right now CXF ServletController uses BaseUrlHelper to recreate an absolute URL it listens upon, by removing all the matrix parameters which were shown to pose a risk (CXF-6216).

The question is: is CXF-6216 fix sufficient or some more formal approach is needed.

My own opinion right now is that a CXF-6216 fix is good and there's no obvious need to add another library unless a new concrete attack is discovered.

CXF-6216 fix results in all the matrix parameters, if any, being removed. The encoding approach will keep them in the encoded form in service URIs which will be shown to the user.