Make SnakeYAML's code point limit configurable

[sschuberth]

Resolves #517.

[sschuberth]

While this could be made configurable in the future, this is a quick fix to be able to handle YAML files that exceed 3 MB.

[charleskorn]

While this could be made configurable in the future, this is a quick fix to be able to handle YAML files that exceed 3 MB.

I would prefer the default limit remain in place, with an option to disable it - otherwise this is a potential denial of service vector.

[sschuberth]

this is a potential denial of service vector.

I'm aware of the original motivation for this limit in upstream, but I only partly share the concerns. Also 3 MB seems really low as a limit.

Anyway, there doesn't seem to be an existing YamlParser configuration mechanism I could hook into, or? So making this configurable would become a larger refactoring, right?

[sschuberth]

So making this configurable would become a larger refactoring, right?

Found a rather easy way via YamlConfiguration.

[sschuberth]

Thanks for the approval, can someone hit the merge button as well?