__systemd_service: fix manpage typos

See merge request !931

__timezone: Make singleton

See merge request !916

Expand and split by consecutive require delimiters

Closes #832

See merge request !930

Resolves #832.

explorer/os_version: Convert Debian sid to version number.

Closes #833

See merge request !927

[__download] fix manual: onchange parameter in wrong section

See merge request !929

[__unpack] add --onchange

See merge request !928

Conversion of Debian sid to versions is done based on Debian codenames.
The version number is the version number of the final release - 0.01.

It is unknown if Debian < 4.0 has any sort of version information
available (apart from maybe checking base-files package version).
But I don't think any of these systems are still alive,
so I think going with 3.99 is fine for those.

__locale_system: Fix version comparison

See merge request ungleich-public/cdist!923

# Conflicts:
#   cdist/conf/type/__locale_system/manifest

Add Alpine Linux as supported for __filesystem.

See merge request ungleich-public/cdist!925

[__unpack] add parameter --tar-extra-args

See merge request ungleich-public/cdist!922

explorer/os: Fix OS detection for openSUSE

See merge request ungleich-public/cdist!924

[__locale_system] fix for debian and ubuntu

See merge request !921

All distros with ID_LIKE suse should be treated as "suse".
My openSUSE Leap 15.1 installation has:
ID_LIKE="suse opensuse"

This patch doesn't require a strict "suse" value but only the word suse to be in
the list.

Proper in the sense that it can handle all numeric version numbers even if they
are not floating point (e.g. 16.04.6).

ubuntu 6.10 and debian etch are 10+ years old and EOL. rather than
preserving compatibility I'll just remove it. while /etc/environment
works too, correct place is /etc/default/locale (as it was before
breaking change). also /etc/debian_version (os_version explorer) may
contain minor version with dot (10.5) or string (bullseye/sid).

Fix building man pages

Closes #830

See merge request !919

Resolves #830.

__sysctl: Fix on NetBSD

See merge request ungleich-public/cdist!918

Fix global explorers for NetBSD

See merge request ungleich-public/cdist!917