added cancel all phrases

Client/Commands/CancelAllPhrases.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using API;
+using API.Commands;
+using Client.Stream;
+
+namespace Client.Commands
+{
+    public class CancelAllPhrases : CommandBase
+    {
+        public override string CmdName => "CancelAllPhrases";
+
+        public override string CmdUsage => "";
+
+        public override string CmdDesc => "Called to cancel a Phrase link.";
+
+        public override string Run(IClient handler, string command, Dictionary<string, object> localVars)
+        {
+            if (!(handler is RyzomClient ryzomClient))
+                throw new Exception("Command handler is not a Ryzom client.");
+
+            // Check parameters.
+            if (HasArg(command))
+                return "Please specify no parameters.";
+
+            // Create the message and send.
+            const string msgName = "PHRASE:CANCEL_ALL";
+            var out2 = new BitMemoryStream();
+
+            if (ryzomClient.GetNetworkManager().GetMessageHeaderManager().PushNameToStream(msgName, out2))
+                ryzomClient.GetNetworkManager().Push(out2);
+            else
+                return $"Unknown message named '{msgName}'.";
+
+            return "";
+        }
+
+        public override IEnumerable<string> GetCmdAliases()
+        {
+            return new string[] { };
+        }
+    }
+}