To finish the install of ap2-subversion, you need
to enable the modules by adding the following lines
to your ${SYSCONFDIR}/apache2/httpd2.conf file:

  LoadModule dav_svn_module ${PREFIX}/lib/apache2/mod_dav_svn.so
  LoadModule authz_svn_module ${PREFIX}/lib/apache2/mod_authz_svn.so

If you already have Apache running on your machine,
you should not use "apachectl2 restart" - instead,
you should fully stop and then restart the server.