Fix deprecation warning, massage connection verifier function somewhat

src/connection/verifier.rs

@@ -47,7 +47,10 @@ impl<S: FingerPrintStore> ClientCertVerifier for Verifier<S> {
                     return Err(rustls::Error::InvalidCertificate(
                         rustls::CertificateError::NotValidForName,
                     ));
+                } else {
+                    return Ok(ClientCertVerified::assertion());
                 }
+            } else {
             }
         }
         todo!()

src/sender/mod.rs

@@ -75,7 +75,7 @@ where
                 let rustls_cert = rustls::Certificate(c.der);
                 let cert_chain = vec![rustls_cert];
                 let key_der = rustls::PrivateKey(c.key);
-                cfg.with_single_cert(cert_chain, key_der)?
+                cfg.with_client_auth_cert(cert_chain, key_der)?
             }
         };
         let client = ClientConnection::new(Arc::new(cfg), dnsname)?;