mdadm: Update to version 4.4

mdadm: Update to version 4.4

- Update from version 4.3 to 4.4
- Update of rootfile not required
- mdadm has been formally moved to github.
- Changelog
    4.4
     Features:
	- Remobe custom bitmap file support from Yu Kuai.
	- Custom device policies implementation from Mariusz Tkaczyk.
	- Self encrypted drives (**SED**) support for IMSM metadata from Blazej Kucman.
	- Support more than 4 disks for **IMSM** RAID10 from Mateusz Kusiak.
	- Read **IMSM** license information from ACPI tables from Blazej Kucman.
	- Support devnode in **--Incremental --remove** from Mariusz Tkaczyk.
	- Printing **IMSM** license type in **--detail-platform** from Blazej Kucman.
	- README.md from Mariusz Tkaczyk and Anna Sztukowska.
     Fixes:
	- Tests improvements from Xiao Ni and Kinga Stefaniuk.
	- Mdmon's Checkpointing improvements from Mateusz Kusiak.
	- Pass mdadm environment flags to systemd-env to enable tests from Mateusz Kusiak.
	- Superblock 1.0 uuid printing fixes from Mariusz Tkaczyk.
	- Find VMD bus manually if link is not available from Mariusz Tkaczyk.
	- Unconditional devices count printing in --detail from Anna Sztukowska.
	- Improve SIGTERM handling during reshape, from Mateusz Kusiak.
	- **Monitor.c** renamed to **Mdmonitor.c** from Kinga Stefaniuk.
	- Mdmonitor service documentation update from Mariusz Tkaczyk.
	- Rework around writing to sysfs files from Mariusz Tkaczyk.
	- Drop of HOT_REMOVE_DISK ioctl in Manage in favour of sysfs from Mariusz Tkaczyk.
	- Delegate disk removal to managemon from Mariusz Tkaczyk.
	- Some clean-ups of legacy code and functionalities like **--auto=md** from Mariusz Tkaczyk.
	- Manual clean-up, references to old kernels removed from Mariusz Tkaczyk.
	- Various static code analysis fixes.
     In this release we created github repository and allowed participation through
      Github. It allowed us to use Github actions adn create CI. Currently, we have:
	- Compilation tests with various gcc.
	- **mdadm** tests.
	- Checkpatch test.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>