debootstrap variant minbase requires to specify additional deboostrap packages in some cases

[manut]

The minbase cannot be chosen
when additional keys are defined by key-file because
GPG is not installed when debootstrap --second-stage is initiated.
--include=gpg2 should be added to debootstrap line.

Same if you need to use repositories that need apt-transport-https.
Than this also needs to be installed during debootstrap.

Currently there is no option for specifiing that. We plan to implement
sth. like a debootstrap-pkg-list and extend 'elbe validate' by some heuristics
to check if minbase and a key is given 'gpg' is in the debootstrap-pkg-list.

[manut]

there should be also a check that apt-transport-https is included if a https repo is specified

[manut]

instead of an extra debootstrap-pkg-list we want to specify the additional packages as an "includepkgs" attribute in the debootstrapvariant tag.

<debootstrapvariant includepkgs="apt-transport-https,gpg2">minbase<debootstrapvariant>