GitLab

Closes #44

When passing --server to irma session, it would erroneously complain about
--url also being set.

fix: both irmaserver and irmaclient now early reject session requests referring nonexisting identifiers

feat: Breaking change: support conjunctions of disjunctions of conjunctions when requesting attributes in any of the three supported session types

Instead of requesting several attributes, one can now request several groups of attributes. Within each such group, attributes belonging to the same credential type always come from the same credential instance. This affects all three session types, as in each of them attributes can be disclosed.

feat: Support --url for session. Some code duplication was unavoidable without splitting up requestorserver.initialize

Verifying an individual scheme no emits the same warnings and errors as verifying multiple schemes.

Resolves #28
Resolves #29
Resolves #30
Co-authored-by: Confiks <confiks@scriptbase.org>

fix: Make irma scheme verify fail when specific folder isn't a scheme, and also doesn't contain any subfolders.