Signed-off-by: Jakub Baron <jakub.baron@oaknorth.com>

When using tar with sudo the extracted files will retain the ownership
of the files in the archive. When using the bash install script the flux
binary is owned by user ID 1001 and group docker after installation.

This commit fixes the ownership by appending the -o option to the tar
command which will extract files with the correct ownership, namely user
root and group root.

Signed-off-by: Julian Lengelsen <julian.lengelsen@th-koeln.de>

This causes the format of the checksum file generated during the release
to change from `flux2_*_checksums.txt` to `flux_*_checksums.txt`.

The configuration change is made through `project_name` and not via the
`checksum.name_template` setting, because a single checksum file is
generated during the release process.

The download and/or installation script in `install/flux.sh` has been
adapted to assume the new filename starting with MINOR version `0.6.0`.

Signed-off-by: Hidde Beydals <hello@hidde.co>

`uname -m` will print out architecture codenames based on UTS_MACHINE
and COMPAT_UTS_MACHINE kernel defined constants. These extra values will
ensure the right version of the arm binary is installed on most Linux
systems running on ARM CPUs.

Signed-off-by: Aurel Canciu <aurelcanciu@gmail.com>

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

Signed-off-by: Hidde Beydals <hello@hidde.co>

Signed-off-by: Hidde Beydals <hello@hidde.co>

To avoid conflicts with the `tk` binary from the Tanka project.

- add checksum verification with sha256sum fallback to shasum
- add downloader fallback to wget
- add os and architecture checks