Pieter Wuille

A few high-level comments: * I don't think we should do link-time plugging in the same PR as runtime plugging, and when we do, I don't think it should be...

@furszy From a quick glance, the passing of the function everywhere is fine I think. I'd suggest passing a pointer to `secp256k1_hash_context` to the sha256 functions rather than the function...

> The output is nice for sure, but wouldn't it be much simpler to just invoke the test binaries with -j? I don't think that's desirable, because it lacks the...

Weak Concept NACK. Given how broken the examples are, I think we should fix them throughout and add testing to prevent regressions, or get rid of them entirely.