tsdb/WAL: Better respect for WAL disabled
tsdb/WAL: Better respect for WAL disabled

nooproblem/influxdb,influxdb/influxdb,influxdata/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdata/influxdb,influxdb/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,li-ang/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb