Well, the experimental mod_tls in Apache no longer builds with rustls-ffi v0.11.0:

"Changed: rustls_client_cert_verifier_optional became rustls_allow_any_anonymous_or_authenticated_client_verifier and must be constructed from a rustls_allow_any_anonymous_or_authenticated_client_builder."

I'll have what these fine people are smoking!😁

(I'll wait for their next release to see if things stablize. They are busy adding useful stuff.)