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Results 2 issues of [X]

Closes [!911](https://github.com/fabiolb/fabio/issues/911) - i have not updated the vendor to keep the PR light (`go mod tidy && go mod vendor`) - there is a setup.sh script in waf folder...

it could be interesting to integrate coraza (https://github.com/corazawaf/coraza) directly in fabio? before starting the implementation I would like some feedback

enhancement