Make Apache and APR use the same flags to specify maintainer mode. I

chose to use --with-maintainer-mode, because that flag can be passed down
using AC_CONFIG_SUBDIRS.  I couldn't find any easy way to pass environment
variables to configure scripts called from within Apache's configure.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85262 13f79535-47bb-0310-9956-ffa450edef68