Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=47364 Document that HttpServletRequest.getAttributeNames() does not return the names of all attributes (internal Tomcat attributes are excluded)
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=47364
Document that HttpServletRequest.getAttributeNames() does not return the names of all attributes (internal Tomcat attributes are excluded)

git-svn-id: 79cef5a5a257cc9dbe40a45ac190115b4780e2d0@831722 13f79535-47bb-0310-9956-ffa450edef68

apache/tomcat,apache/tomcat,Nickname0806/Test_Q4,Nickname0806/Test_Q4,Nickname0806/Test_Q4,Nickname0806/Test_Q4,apache/tomcat,apache/tomcat,apache/tomcat