Started adding licenses from Debian DEP5

[DrDub]

Added public domain, python, artistic and cddl.

It looks like to add a license I need to mention a sample program that
adopts that license.

Some questions:

public_domain is compatible with all licenses, my understanding of the code
is that leaving it out from incompatible_licenses does the trick. If I were to add
it to both sides, it'll fail by default, isn't it?

It is unclear to me whether CDDL is compatible with OpenSSL, but adding
multiple compatibility sets won't work with the current code.

[flepied]

DrDub,

The important part to add a new license is to provide the requirement clauses. Of course license clauses can also be added to document the licenses of components.

Regarding incompatible_licenses, you can add multiple declarations to describe which sets of licenses are incompatible. If there is no incompatibility, you just do nothing.

Fred