disable tls by default on async-std

Author: lovasoa

sqlx-core/src/mssql/connection/tls_prelogin_stream_wrapper.rs

@@ -143,7 +143,7 @@ impl<S: AsyncRead + AsyncWrite + Unpin + Send> AsyncRead for TlsPreloginWrapper<
         buf: &mut [u8],
     ) -> Poll<io::Result<usize>> {
         if self.pending_handshake {
-            panic!("TLS not supported on async-std for mssql");
+            unimplemented!("TLS not supported on async-std for mssql");
         }
 
         Pin::new(&mut self.stream).poll_read(cx, buf)

sqlx-core/src/mssql/options/mod.rs

@@ -60,7 +60,10 @@ impl MssqlConnectOptions {
             server_name: String::new(),
             client_interface_name: String::new(),
             language: String::new(),
+            #[cfg(feature = "_rt-tokio")]
             encrypt: Encrypt::On,
+            #[cfg(not(feature = "_rt-tokio"))]
+            encrypt: Encrypt::NotSupported,
             trust_server_certificate: true,
             hostname_in_certificate: None,
             ssl_root_cert: None,