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Chain of responsiblity pattern - javax.servlet.Filter as real example is missed
I think that on the chain of responsibility pattern on the section real word examples the most important java real word example is missed.

I suggest to add there **javax.servlet.Filter** as the best patter for the people who meet this patter the first time.

I could create the pull request if it is needed.

intercepting-filter/README.md
intercepting-filter/README.md
diff --git a/intercepting-filter/README.md b/intercepting-filter/README.md
index 327f091b1e93..7d53472a077f 100644
--- a/intercepting-filter/README.md
+++ b/intercepting-filter/README.md
@@ -24,6 +24,7 @@ Use the Intercepting Filter pattern when
 
 ## Real world examples
 
+* [javax.servlet.FilterChain](https://tomcat.apache.org/tomcat-8.0-doc/servletapi/javax/servlet/FilterChain.html) and [javax.servlet.Filter](https://tomcat.apache.org/tomcat-8.0-doc/servletapi/javax/servlet/Filter.html)
 * [Struts 2 - Interceptors](https://struts.apache.org/docs/interceptors.html)
 
 ## Credits
