semi-revert 573264. It is totally bogus that we

need to do this, but until we create mod_proxy_structs.h
which can then be included by mod_proxy.h as well as scoreboard.h,
we'll make do.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@573555 13f79535-47bb-0310-9956-ffa450edef68