Add mux settings for per-server, VMess/Shadowsocks/VLESS/Trojan

If you want to use global settings, do not set per-server

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -246,6 +246,7 @@ public class ConfigHandler
             item.ShortId = profileItem.ShortId;
             item.SpiderX = profileItem.SpiderX;
             item.Extra = profileItem.Extra;
+            item.MuxEnabled = profileItem.MuxEnabled;
         }
 
         var ret = item.ConfigType switch

v2rayN/ServiceLib/Models/ProfileItem.cs

@@ -94,4 +94,5 @@ public class ProfileItem: ReactiveObject
     public string ShortId { get; set; }
     public string SpiderX { get; set; }
     public string Extra { get; set; }
+    public bool? MuxEnabled { get; set; }
 }

v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs

@@ -751,7 +751,8 @@ public class CoreConfigSingboxService
     {
         try
         {
-            if (_config.CoreBasicItem.MuxEnabled && _config.Mux4SboxItem.Protocol.IsNotEmpty())
+            var muxEnabled = node.MuxEnabled ?? _config.CoreBasicItem.MuxEnabled;
+            if (muxEnabled && _config.Mux4SboxItem.Protocol.IsNotEmpty())
             {
                 var mux = new Multiplex4Sbox()
                 {

v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs

@@ -631,7 +631,7 @@ public class CoreConfigV2rayService
     {
         try
         {
-            var muxEnabled = _config.CoreBasicItem.MuxEnabled;
+            var muxEnabled = node.MuxEnabled ?? _config.CoreBasicItem.MuxEnabled;
             switch (node.ConfigType)
             {
                 case EConfigType.VMess: