Merge branch 'jk/apache-test-for-2.4' into maint

Allow our tests to run with newer Apache. * jk/apache-test-for-2.4: lib-httpd/apache.conf: check version only after mod_version loads t/lib-httpd/apache.conf: configure an MPM module for apache 2.4 t/lib-httpd/apache.conf: load compat access module in apache 2.4 t/lib-httpd/apache.conf: load extra auth modules in apache 2.4 t/lib-httpd/apache.conf: do not use LockFile in apache >= 2.4