Core/Channels: Fix a bug that would cause channel settings to disappear in certain settings. Fix a bug that would cause channels to not be saved on .server shutdown without delay.

Port From (https://github.com/TrinityCore/TrinityCore/commit/f434241305089942e7df5579e81137624c3ae0ef)

Source/Game/Chat/Channels/ChannelManager.cs

@@ -193,18 +193,6 @@ namespace Game.Chat
             return result;
         }
 
-        public void LeftChannel(string name)
-        {
-            string channelName = name.ToLower();
-
-            var channel = _customChannels.LookupByKey(channelName);
-            if (channel == null)
-                return;
-
-            if (channel.GetNumPlayers() == 0)
-                _customChannels.Remove(channelName);
-        }
-
         public void LeftChannel(uint channelId, AreaTableRecord zoneEntry)
         {
             var guid = CreateBuiltinChannelGuid(channelId, zoneEntry);

Source/Game/Entities/Player/Player.cs

@@ -2617,12 +2617,8 @@ namespace Game.Entities
                 // delete channel if empty
                 ChannelManager cMgr = ChannelManager.ForTeam(GetTeam());
                 if (cMgr != null)
-                {
                     if (ch.IsConstant())
                         cMgr.LeftChannel(ch.GetChannelId(), ch.GetZoneEntry());
-                    else
-                        cMgr.LeftChannel(ch.GetName());
-                }
             }
             Log.outDebug(LogFilter.ChatSystem, "Player {0}: channels cleaned up!", GetName());
         }

Source/Game/Handlers/ChannelHandler.cs

@@ -102,8 +102,6 @@ namespace Game
 
                 if (packet.ZoneChannelID != 0)
                     cMgr.LeftChannel((uint)packet.ZoneChannelID, zone);
-                else
-                    cMgr.LeftChannel(packet.ChannelName);
             }
         }
 

Source/Game/Server/WorldManager.cs

@@ -1806,14 +1806,9 @@ namespace Game
             m_ShutdownMask = options;
             m_ExitCode = exitcode;
 
-            // If the shutdown time is 0, set m_stopEvent (except if shutdown is 'idle' with remaining sessions)
+            // If the shutdown time is 0, evaluate shutdown on next tick (no message)
             if (time == 0)
-            {
+                m_ShutdownTimer = 1;
-                if (!options.HasAnyFlag(ShutdownMask.Idle) || GetActiveAndQueuedSessionCount() == 0)
-                    IsStopped = true;                             // exist code already set
-                else
-                    m_ShutdownTimer = 1;                            //So that the session count is re-evaluated at next world tick
-            }
             // Else set the shutdown timer and warn users
             else
             {