Permission for not losing power while offline.

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

@@ -514,6 +514,9 @@ public abstract class MemoryFPlayer implements FPlayer {
     }
 
     public void losePowerFromBeingOffline() {
+        if(P.perms != null && P.perms.playerHas((String) null, getName(), "factions.dontlosepoweroffline")) {
+            return;
+        }
         if (Conf.powerOfflineLossPerDay > 0.0 && this.power > Conf.powerOfflineLossLimit) {
             long now = System.currentTimeMillis();
             long millisPassed = now - this.lastPowerUpdateTime;

src/main/resources/plugin.yml

@@ -253,3 +253,5 @@ permissions:
     description: sort factions
   factions.togglealliancechat:
     description: toggle alliance chat on and off
+  factions.dontlosepoweroffline:
+    description: Don't lose power for being offline.