* use cp instead of mv so that the original file doesn't disappear and we
can rerun the script
 * osc rm can fail if the package is empty (especially at creation time
of the package)

Use § for sed separator instead of | so that we can have | in variables.

We need | in PACKAGE_BUILD_DEPENDENCIES of fluent-bit

dep--fluent-bit was just a development package with less dependencies

OBS_PROJECT will be by default the branch project of our production
project : home:VIFIBnexedi:branches:home:VIFIBnexedi

Then if everything compile fine on the branch project, we will submit
the package on OBS website.

See https://www.debian.org/doc/manuals/maint-guide/dother.en.html#dirs

See merge request nexedi/slapos.package!164

lunzip is used as a basic example.

See merge request nexedi/slapos.package!168

we use https only starting from debian 11

with backported fixes for debian 11 compatibility

fixup for 203927d9

The old dsc was not removed correctly

See merge request !166

fixup for 203927d9

The old tarball was not removed correctly