Harden NTLM authentication and restore SGU profiles

tests/SGU.CredentialProvider.Tests/BrokerClientTests.cs

@@ -10,7 +10,7 @@ public sealed class BrokerClientTests
     [Fact]
     public void DefaultClientTimeoutLeavesMarginForThePortalAndBroker()
     {
-        Assert.Equal(35, new ProviderSettings().TimeoutSeconds);
+        Assert.Equal(90, new ProviderSettings().TimeoutSeconds);
     }
 
     [Fact]

tests/SGU.CredentialProvider.Tests/ProviderTileIconTests.cs

@@ -16,7 +16,13 @@ public sealed class ProviderTileIconTests
 
         Assert.Equal(ProviderTileIcon.Size, logo.Bitmap.Width);
         Assert.Equal(ProviderTileIcon.Size, logo.Bitmap.Height);
-        Assert.Equal(Color.FromArgb(0, 83, 155).ToArgb(), logo.Bitmap.GetPixel(0, 0).ToArgb());
+        Assert.Equal(0, logo.Bitmap.GetPixel(0, 0).A);
+        Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, 0).A);
+        Assert.Equal(0, logo.Bitmap.GetPixel(0, ProviderTileIcon.Size - 1).A);
+        Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, ProviderTileIcon.Size - 1).A);
+        Assert.Equal(
+            Color.FromArgb(0, 83, 155).ToArgb(),
+            logo.Bitmap.GetPixel(6, ProviderTileIcon.Size / 2).ToArgb());
         int lightPixels = 0;
         for (int x = 0; x < logo.Bitmap.Width; x++)
         {