FIXES #1837

If there is no subvolume set, skip creation of that subvolume.
This allows root to be on a bare FS, without a tag or subvolume
name. To achieve this, use
    subvolume: no
(no quotes there) in the YAML.

Timezones 5.0 and 5.5 have considerable overlap; clear up most
of it. Since a pixel is about 55x55km on the ground, and the
translation of latitude and longitude is sketchy at best,
accuracy on this timezone map is not very good.

FIXES #1832

[fstab] Use different options for the btrfs swap subvolume

- Add a changelog entry for what has been done.

- rootMountPoint is a global thing, not a job-configuration item

- The config-files has a typo, so didn't validate, so
  the loaded data was wrong, leading to test-failures.
  See 61e0d538 .

[packages] Additional pacman options

Update zfs module documentation

Merge branch 'development' of ssh://gitlab.manjaro.org:22277/applications/calamares into development