Add a new command: `index with taints` about ursadb

[ITAYC0HEN]

Why "taint" was chosen for the emaning of "label" or "tag"?
Anyways, good idea.

What about

index "/xxx" with [gram3] as ["xyz"]

[msm-code]

Not sure 🤔. That's how they were called during the design. I think that I sometimes refer to them as tag in mquery, which may cause even more confusion.

Probably because the original goal was to mark some datasets as special, so they won't get merged into other, clean ones.

I don't think this feature is used outside by anyone outside of cert.pl and mquery internally, so it's not too late change it, if you think it's worth it.

[ITAYC0HEN]

Absolutely up to you :) I don't think it is a describing name, but maybe it's a popular term I've never heard in relation to tagging and labeling.

[msm-code]

The name was stolen from https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/

Taints are the opposite – they allow a node to repel a set of pods.
(...) One or more taints are applied to a node; this marks that the node should not accept any pods that do not tolerate the taints.

But yeah, tag is probably make easily understood in this context 🤔

[msm-code]

Closing since this feature is already implemented (with the original name and original syntax)