More concurrency fixes + Zombify + BPQ available

Fixed some inconsistencies due to race conditions in the project, added
Zombify monster effect, made BPQ available and some minor patches.

wz/Quest.wz/Act.img.xml

@@ -12821,6 +12821,13 @@
     <imgdir name="0">
     </imgdir>
     <imgdir name="1">
+      <imgdir name="item">
+        <imgdir name="0">
+          <int name="count" value="1"/>
+          <int name="id" value="1142079"/>
+        </imgdir>
+      </imgdir>
+      <int name="exp" value="6800"/>
     </imgdir>
   </imgdir>
   <imgdir name="2245">