EI S11: drop equippable items when imprisoned (#8982)

This is thematic, and also prevents cheese with shield+dacyn and baneblade+gate

data/campaigns/Eastern_Invasion/scenarios/11_Captured.cfg

@@ -550,6 +550,30 @@
             [/not]
         ) side 3}
 
+        # dump items in the orcish treasury
+        # this is thematic, and also prevents cheese with shield+dacyn and baneblade+gate
+#define DROP_ITEM ID PLACE_ITEM
+    [if]
+        [have_unit]
+            trait=TRAIT_{ID}
+        [/have_unit]
+        [then]
+            [remove_trait]
+                trait_id=TRAIT_{ID}
+            [/remove_trait]
+            {PLACE_ITEM}
+        [/then]
+    [/if]
+#enddef
+        {DROP_ITEM {ID_HOLY_AMULET_1 } {PLACE_ITEM_HOLY_AMULET {ID_HOLY_AMULET_1} 14 16}}
+        {DROP_ITEM {ID_HOLY_AMULET_2 } {PLACE_ITEM_HOLY_AMULET {ID_HOLY_AMULET_2} 16 17}}
+        {DROP_ITEM {ID_CRYSTAL_QUIVER} {PLACE_ITEM_CRYSTAL_QUIVER                 17 18}}
+
+        {DROP_ITEM {ID_SENTINEL      } {PLACE_ITEM_SHIELD_OF_THE_SENTINEL 33 11}}
+        {DROP_ITEM {ID_BANEBLADE     } {PLACE_ITEM_BANEBLADE              34 11}}
+        {DROP_ITEM {ID_PLAGUE_STAFF  } {PLACE_ITEM_PLAGUE_STAFF           34 10}}
+#undef DROP_ITEM
+
         #------------------
         # NO MAINTENANCE COSTS
         #------------------