This is what it's meant all along, but now we actually have multiple
implementations, it's clearer to use the name of the library.

Most of the network-facing facilities have been copied to the socket and
openssl streams. No code now uses these functions directly anymore, so
we can now remove them.

[factor] Join typedef and struct definitions in single file.

This option make it easy to ignore anything about the server we're
connecting to, which is bad security practice. This was necessary as we
didn't use to expose detailed information about the certificate, but now
that we do, we should get rid of this.

If the user wants to ignore everything, they can still provide a
callback which ignores all the information passed.

OpenSSL's tests init everything in the main thread, so let's do that.

This kind of stuff should have unit tests, even if it's just to show
what we expect to match successfully.

...and have that call manage replaced memory in the output structure.