Allow players to monitor joins and leaves of their faction members.

Larger servers tend to have join and leave messages disabled for the entire server. A few have requested to allow faction members to monitor join and leave messages of their own members.

src/main/java/com/massivecraft/factions/cmd/CmdLogins.java

@@ -0,0 +1,25 @@
+package com.massivecraft.factions.cmd;
+
+import com.massivecraft.factions.struct.Permission;
+import com.massivecraft.factions.zcore.util.TL;
+
+public class CmdLogins extends FCommand {
+
+    public CmdLogins() {
+        super();
+        this.aliases.add("login");
+        this.aliases.add("logins");
+        this.aliases.add("logout");
+        this.aliases.add("logouts");
+        this.senderMustBePlayer = true;
+        this.senderMustBeMember = true;
+        this.permission = Permission.MONITOR_LOGINS.node;
+    }
+
+    @Override
+    public void perform() {
+        boolean monitor = fme.isMonitoringJoins();
+        fme.msg(TL.COMMAND_LOGINS_TOGGLE, String.valueOf(!monitor));
+        fme.setMonitorJoins(!monitor);
+    }
+}