(#2656) Add information to class

So that when we look back on this, we will remember why these classes
were re-instated.

src/chocolatey/infrastructure.app/commands/ChocolateyUpdateCommand.cs

@@ -22,6 +22,16 @@ namespace chocolatey.infrastructure.app.commands
     using configuration;
     using services;
 
+    /// <summary>
+    /// This class is provided to allow backwards compatibility for users of older Chocolatey Licensed Extension versions,
+    /// for example, those using a perpetual license.  In the release of Chocolatey CLI v1.0.0 and Chocolatey Licensed
+    /// Extension v4.0.0, these classes were removed, as it was thought that anyone using v1.0.0 would upgrade to v4.0.0
+    /// as well, however, this is not always possible.
+    ///
+    /// Therefore, this skeleton class, with no actual implementations, have been re-added to allow usage of v1.0.1 of
+    /// Chocolatey, along with say v3.2.0, or v2.2.1, of Chocolatey Licensed Extension.  It is expected at some point that
+    /// this class can/will be removed, perhaps in v2.0.0, but for now, they will remain in place.
+    /// </summary>
     public class ChocolateyUpdateCommand : ChocolateyUpgradeCommand
     {
         public ChocolateyUpdateCommand(IChocolateyPackageService packageService) : base(packageService)

src/chocolatey/infrastructure.app/commands/ChocolateyVersionCommand.cs

@@ -22,6 +22,16 @@ namespace chocolatey.infrastructure.app.commands
     using configuration;
     using services;
 
+    /// <summary>
+    /// This class is provided to allow backwards compatibility for users of older Chocolatey Licensed Extension versions,
+    /// for example, those using a perpetual license.  In the release of Chocolatey CLI v1.0.0 and Chocolatey Licensed
+    /// Extension v4.0.0, these classes were removed, as it was thought that anyone using v1.0.0 would upgrade to v4.0.0
+    /// as well, however, this is not always possible.
+    ///
+    /// Therefore, this skeleton class, with no actual implementations, have been re-added to allow usage of v1.0.1 of
+    /// Chocolatey, along with say v3.2.0, or v2.2.1, of Chocolatey Licensed Extension.  It is expected at some point that
+    /// this class can/will be removed, perhaps in v2.0.0, but for now, they will remain in place.
+    /// </summary>
     public class ChocolateyVersionCommand : ChocolateyUpgradeCommand
     {
         public ChocolateyVersionCommand(IChocolateyPackageService packageService) : base(packageService)