Merge pull request #224 from apache/feature/WW-5374-context

[WW-5374] Documents prependServletContext flag
diff --git a/source/core-developers/csp-interceptor.md b/source/core-developers/csp-interceptor.md
index 2317565..83b99f3 100644
--- a/source/core-developers/csp-interceptor.md
+++ b/source/core-developers/csp-interceptor.md
@@ -30,6 +30,7 @@
 - `enforcingMode` (default `false`) - When set to "true", the enforce mode has been enabled, and the provided policy 
   is going to be enforced.
 - `reportUri` - an uri under, which the violations have to be reported.
+- `prependServletContext` (default `true`) - a flag to prepend or not the Servlet context to the `reportUri`  
 
 ## Report action