multiline high entropy exclusions

[srhb]

Feature Request

Multi-line entropy exclusion pattern

Is your feature request related to a problem? Please describe.

I would like to ignore eg.

BEGIN PUBLIC KEY
<many lines of high entropy stuff>
END PUBLIC KEY

(And nix fetchers, and other things)

Describe the solution you'd like

A way to exclude "high entropy stuff" between arbitrary delimiters

Describe alternatives you've considered

Adding each and every multiline high-entropy-string to other excluders - cumbersome.
Completely ignoring files with multiline secrets - risky.

Teachability, Documentation, Adoption, Migration Strategy