ssh: accept WSAECONNABORTED in TestClientAuthMaxAuthTriesPublicKey

Fixes golang/go#50805

Change-Id: Icdd2835b1626240faf61936288f279570c873158
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/381614
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>

ssh/client_auth_test.go

@@ -13,6 +13,7 @@ import (
 	"log"
 	"net"
 	"os"
+	"runtime"
 	"strings"
 	"testing"
 )
@@ -639,7 +640,15 @@ func TestClientAuthMaxAuthTriesPublicKey(t *testing.T) {
 	if err := tryAuth(t, invalidConfig); err == nil {
 		t.Fatalf("client: got no error, want %s", expectedErr)
 	} else if err.Error() != expectedErr.Error() {
-		t.Fatalf("client: got %s, want %s", err, expectedErr)
+		// On Windows we can see a WSAECONNABORTED error
+		// if the client writes another authentication request
+		// before the client goroutine reads the disconnection
+		// message.  See issue 50805.
+		if runtime.GOOS == "windows" && strings.Contains(err.Error(), "wsarecv: An established connection was aborted") {
+			// OK.
+		} else {
+			t.Fatalf("client: got %s, want %s", err, expectedErr)
+		}
 	}
 }