switch to APR 1.0 API (which is still in flux)

because of the changes to the argument lists of apr_mmap_dup and apr_socket_create,
2.1-dev won't build with apr and apr-util's 0.9 branch anymore


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101154 13f79535-47bb-0310-9956-ffa450edef68