Cleanup & Fixes for .NET 5 (#309)

- [X] Fixes several bugs
- [X] Updates more ordinal issues
- [X] Cleans up the code a bit
- [X] Turns classes static that should have been
- [X] Changes TcpServer.Instances to a HashSet

Bumps release version

Projects/UOContent/Engines/Help/SpeechLog.cs

@@ -34,8 +34,7 @@ namespace Server.Engines.Help
             CommandSystem.Register("SpeechLog", AccessLevel.Counselor, SpeechLog_OnCommand);
         }
 
-        [Usage("SpeechLog")]
-        [Description("Opens the speech log of a given target.")]
+        [Usage("SpeechLog"), Description("Opens the speech log of a given target.")]
         private static void SpeechLog_OnCommand(CommandEventArgs e)
         {
             var from = e.Mobile;