apr_dbd_check_conn() just returns APR_SUCCESS or APR_EGENERAL, so we

don't actually have a driver-specific value to pass to apr_dbd_error(),
but that's OK because most/all drivers just ignore this value anyway


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@539687 13f79535-47bb-0310-9956-ffa450edef68