Improve license file discovery #334
Description
I'm aware that discovering license files in Jars requires heuristics und thus is unlikely to ever be perfect; yet there are situations where it can be improved relatively easily. For example, in the case of openpdf-2.0.5.jar (com.github.librepdf:openpdf:2.0.5), the plugin discovers font-fallback/README.md (which is not a license file), but fails to discover META-INF/LICENSES.md.
Suggestions:
- Make the set of license file basenames configurable
- Add "licenses" (plural) to the default set
- Maybe add logic to accept files with license-specific names such as
APACHE-LICENSE-2.0.txt(though of course this might get hairy)