Made new flags class attribute. Replaced by admin_only.

Made new mother_zombie class flag and zr_class_default_mother_zombie CVAR.
Updated zombie config. Added more spacing for better readability.
Fixed incorrect off-values in jump boost.

src/zr/playerclasses/apply.inc

@@ -39,11 +39,18 @@ bool:ClassApplyAttributes(client, bool:improved = false)
 {
     new classindex = ClassGetActiveIndex(client);
     
-    if (classindex < 0)
+    // Validate class index.
+    if (!ClassValidateIndex(classindex))
     {
         return false;
     }
     
+    // Override improved settings if it's a mother zombie class.
+    if (ClassHasFlags(classindex, ZR_CLASS_FLAG_MOTHER_ZOMBIE))
+    {
+        improved = false;
+    }
+    
     ClassApplyModel(client, classindex);
     ClassApplyAlpha(client, classindex);
     ClassApplyOverlay(client, classindex);