Water of Life + Fixed GPQ & Buff system

Added Water of Life. Fixed Shuang (GPQ) npc dc'ing the leader when first
trying to enter the waiting area. Fixed some cases with the revamped
buff system, that would not properly check for the best buffs in some
scenarios, and would throw exceptions, caused by not properly protecting
access to critical data.

src/constants/ServerConstants.java

@@ -49,6 +49,7 @@ public class ServerConstants {
     public static final boolean USE_REFRESH_RANK_MOVE = true;
     public static final boolean USE_ENFORCE_MDOOR_POSITION = true;  //Forces mystic door to be spawned near spawnpoints. (since things bugs out other way, and this helps players to locate the door faster)
     public static final boolean USE_ERASE_UNTRADEABLE_DROP = true;  //Forces flagged untradeable items to disappear when dropped.
+    public static final boolean USE_ERASE_PET_ON_EXPIRATION = false;//Forces pets to be removed from inventory when expire time comes, rather than converting it to a doll.
     public static final boolean USE_BUFF_MOST_SIGNIFICANT = true;   //When applying buffs, the player will stick with the highest stat boost among the listed, rather than overwriting stats.
     
     //Server Rates And Experience