Eliminate apr_win.h and apr_winconfig.h (and the ugly #ifdefs they cause).

Now, apr.h and apr_config.h are generated from apr.hw and apr_config.hw
at build time. At this point, the server will not compile on Windows because
of the recent DSO commits. Fixing those next.

Submitted by: Bill Rowe & Bill Stoddard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84896 13f79535-47bb-0310-9956-ffa450edef68