- Update to version 6.4+7+ga4d3588:
Maintenance update with previous fixes from PTFs.

- Add systemd service file for systemd with increased
TaskMax and LimitNOFILE (bsc#1104770)

- Fix crash on MonitorStatus (bsc#1096363, bsc#1081286)

- Ignore NewArray message if does not exists yet (bsc#1091619)

- md_monitor: fixup crash in display_md_status (bsc#1081286)

* Ignore inactive arrays (bsc#1068175, bsc#1079253)
* Store alias in struct md_dev to avoid lookup errors (bsc#1068175,
bsc#1079253)