SPIGOT-1634: Fix cancelling ServerCommandEvent

nms-patches/DedicatedServer.patch

@@ -161,7 +161,7 @@
          super.D();
          this.aL();
      }
-@@ -329,7 +388,14 @@
+@@ -329,7 +388,15 @@
          while (!this.serverCommandQueue.isEmpty()) {
              ServerCommand servercommand = (ServerCommand) this.serverCommandQueue.remove(0);
  
@@ -169,6 +169,7 @@
 +            // CraftBukkit start - ServerCommand for preprocessing
 +            ServerCommandEvent event = new ServerCommandEvent(console, servercommand.command);
 +            server.getPluginManager().callEvent(event);
++            if (event.isCancelled()) continue;
 +            servercommand = new ServerCommand(event.getCommand(), servercommand.source);
 +
 +            // this.getCommandHandler().a(servercommand.source, servercommand.command); // Called in dispatchServerCommand
@@ -177,7 +178,7 @@
          }
  
      }
-@@ -536,16 +602,70 @@
+@@ -536,16 +603,70 @@
      }
  
      public String getPlugins() {