Mercenary, Regen and Frenzy Improvements (#8185)

- When a Mercenary gains a bonus, there will now be an animation
- Mercenary bonuses now last for 5 minutes instead of 10 minutes
- Fixed HP/SP recovery values of Mercenaries (and Elementals)
- Mercenaries now recover HP when walking
- Homunculi no longer recover SP when walking
- Mercenary natural recovery interval is 8s for HP and 6s for SP
- Homunculus natural recovery interval is 2s for HP and 4s for SP
- MER_CRASH now only deals 1 hit and can be cast-cancelled
- Frenzy now drains HP every 10 seconds instead of every 15 in pre-renewal
- Fixed SP cost Mercenary Frenzy (100 -> 200 SP)
- Killing monsters exactly 2 times below you base level now still counts as mercenary kill
- Fixes #8184 
- Fixes #7663

src/map/mob.cpp

@@ -3109,8 +3109,8 @@ int mob_dead(struct mob_data *md, struct block_list *src, int type)
 					achievement_update_objective(sd, AG_BATTLE, 1, md->mob_id);
 			}
 
-			// The master or Mercenary can increase the kill count
-			if (sd->md && src && (src->type == BL_PC || src->type == BL_MER) && mob->lv > sd->status.base_level / 2)
+			// The master or Mercenary can increase the kill count, if the monster level is greater or equal than half the baselevel of the master
+			if (sd->md && src && (src->type == BL_PC || src->type == BL_MER) && mob->lv >= sd->status.base_level / 2)
 				mercenary_kills(sd->md);
 		}