crypto/tls clients can panic when provided a certificate of
the wrong type for the negotiated parameters. net/http clients
performing HTTPS requests are also affected. The panic can be
triggered by an attacker in a privileged network position
without access to the server certificate's private key, as
long as a trusted ECDSA or Ed25519 certificate for the server
exists (or can be issued), or the client is configured with
Config.InsecureSkipVerify. Clients that disable all TLS_RSA
cipher suites (that is, TLS 1.0–1.2 cipher suites without
ECDHE), as well as TLS 1.3-only clients, are unaffected.