Teach MinecraftServer how to handle Remote Console commands.

This fixes BUKKIT-220. Thanks for the help bawoodruff!

By: Andrew Ardill <andrew.ardill@gmail.com>

paper-server/src/main/java/org/bukkit/craftbukkit/command/CraftRemoteConsoleCommandSender.java

@@ -0,0 +1,26 @@
+package org.bukkit.craftbukkit.command;
+
+import net.minecraft.server.RemoteControlCommandListener;
+import org.bukkit.command.RemoteConsoleCommandSender;
+
+public class CraftRemoteConsoleCommandSender extends ServerCommandSender implements RemoteConsoleCommandSender {
+    public CraftRemoteConsoleCommandSender() {
+        super();
+    }
+
+    public void sendMessage(String message) {
+        RemoteControlCommandListener.a.sendMessage(message);
+    }
+
+    public String getName() {
+        return "Rcon";
+    }
+
+    public boolean isOp() {
+        return true;
+    }
+
+    public void setOp(boolean value) {
+        throw new UnsupportedOperationException("Cannot change operator status of remote controller.");
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/command/ServerCommandSender.java

@@ -0,0 +1,71 @@
+package org.bukkit.craftbukkit.command;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Server;
+import org.bukkit.command.CommandSender;
+import org.bukkit.permissions.PermissibleBase;
+import org.bukkit.permissions.Permission;
+import org.bukkit.permissions.PermissionAttachment;
+import org.bukkit.permissions.PermissionAttachmentInfo;
+import org.bukkit.plugin.Plugin;
+
+import java.util.Set;
+
+public abstract class ServerCommandSender implements CommandSender {
+    private final PermissibleBase perm = new PermissibleBase(this);
+
+    public ServerCommandSender() {
+    }
+
+    public boolean isPermissionSet(String name) {
+        return perm.isPermissionSet(name);
+    }
+
+    public boolean isPermissionSet(Permission perm) {
+        return this.perm.isPermissionSet(perm);
+    }
+
+    public boolean hasPermission(String name) {
+        return perm.hasPermission(name);
+    }
+
+    public boolean hasPermission(Permission perm) {
+        return this.perm.hasPermission(perm);
+    }
+
+    public PermissionAttachment addAttachment(Plugin plugin, String name, boolean value) {
+        return perm.addAttachment(plugin, name, value);
+    }
+
+    public PermissionAttachment addAttachment(Plugin plugin) {
+        return perm.addAttachment(plugin);
+    }
+
+    public PermissionAttachment addAttachment(Plugin plugin, String name, boolean value, int ticks) {
+        return perm.addAttachment(plugin, name, value, ticks);
+    }
+
+    public PermissionAttachment addAttachment(Plugin plugin, int ticks) {
+        return perm.addAttachment(plugin, ticks);
+    }
+
+    public void removeAttachment(PermissionAttachment attachment) {
+        perm.removeAttachment(attachment);
+    }
+
+    public void recalculatePermissions() {
+        perm.recalculatePermissions();
+    }
+
+    public Set<PermissionAttachmentInfo> getEffectivePermissions() {
+        return perm.getEffectivePermissions();
+    }
+
+    public boolean isPlayer() {
+        return false;
+    }
+
+    public Server getServer() {
+        return Bukkit.getServer();
+    }
+}