adapt to API change (Tls.Config.{client,server} may result in an error)

Author: hannesm

miou/tests/fuzz.ml

@@ -261,9 +261,9 @@ let run seed operations =
     Rresult.R.failwith_error_msg (Ca.make fuzz_coop seed)
   in
   let cfg_server =
-    Tls.Config.server ~certificates:(`Single ([ cert ], pk)) ()
+    Result.get_ok (Tls.Config.server ~certificates:(`Single ([ cert ], pk)) ())
   in
-  let cfg_client = Tls.Config.client ~authenticator () in
+  let cfg_client = Result.get_ok (Tls.Config.client ~authenticator ()) in
   let to_client, to_server = List.split operations in
   let stop = Stop.create () in
   let prm0 = Miou.async @@ fun () -> run_server ~to_server ~stop fd cfg_server in

miou/tls_miou_unix.ml

@@ -293,7 +293,11 @@ let resolve host service =
   | ai :: _ -> ai.ai_addr
 
 let connect authenticator (v, port) =
-  let conf = Tls.Config.client ~authenticator () in
+  let conf =
+    match Tls.Config.client ~authenticator () with
+    | Ok config -> config
+    | Error `Msg msg -> Fmt.invalid_arg "Configuration failure: %s" msg
+  in
   let addr = resolve v (string_of_int port) in
   let fd =
     match addr with