Add newline and {null} support for player messages.

src/main/java/com/massivecraft/factions/zcore/persist/MemoryFPlayer.java

@@ -854,6 +854,15 @@ public abstract class MemoryFPlayer implements FPlayer {
     // -------------------------------------------- //
 
     public void sendMessage(String msg) {
+        if (msg.contains("{null}")) {
+            return; // user wants this message to not send
+        }
+        if (msg.contains("/n/")) {
+            for (String s : msg.split("/n/")) {
+                sendMessage(s);
+            }
+            return;
+        }
         Player player = this.getPlayer();
         if (player == null) {
             return;