mod_dumpio: follow up to r1818802.

Negate APLOGctrace7(c) test!

Also, return DECLINED when nothing is to be done, same result as OK but
possibly more semantically correct.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1818825 13f79535-47bb-0310-9956-ffa450edef68