Removes the callbacks from DatabaseServerMessenger, moves logic for cold boot into the components responsible for what needs to happen in cold boot. This is still not ideal but we are stuck with backwards compat. In netcore the initialization will be fixed up (if not already). Ensure examine rebuilds don't occur until the first http request is done instead of on a timer which could be problematic with cold boots.

src/Umbraco.Core/Sync/SyncBootState.cs

@@ -1,24 +1,20 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Umbraco.Core.Sync
+namespace Umbraco.Core.Sync
 {
     public enum SyncBootState
     {
         /// <summary>
-        /// Unknown state. Treat as HasSyncState
+        /// Unknown state. Treat as WarmBoot
         /// </summary>
         Unknown = 0,
+
         /// <summary>
         /// Cold boot. No Sync state
         /// </summary>
         ColdBoot = 1,
+
         /// <summary>
         /// Warm boot. Sync state present
         /// </summary>
-        HasSyncState = 2
+        WarmBoot = 2
     }
 }