Fix r1593664 where I miss read the code and what is performed in "header_inout_cmd()" where arguments are "shuffled" according to the "action" to be performed.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1599796 13f79535-47bb-0310-9956-ffa450edef68