level 80 characters get a 5th disc rune

src/engine/net/client/msg/ApplyRuneMsg.java

@@ -306,6 +306,8 @@ public class ApplyRuneMsg extends ClientNetMsg {
         }
         //if discipline, check number applied
         if (isDiscipline(runeID)) {
+            if(playerCharacter.getLevel() == 80)
+                discCount -= 1; // level 80 characters get an extra disc rune
             if (playerCharacter.getLevel() < 70) {
                 if (discCount > 2) {
                     return false;