Comment 14 for bug 1818142

Something like (declaim (sb-ext:please-be-nitpicky)) in .sbclrc sounds good to me, and could certainly be advertised for newcomers to SBCL as a source of more useful information.

I think it would also be worth to create a new subtype of all such non-standard style-warnings that SBCL signals, so they can be handled or muffled as appropriate.