[Conf] Add BROKEN_HEADERS_MAILLIST composite

conf/composites.conf

@@ -142,6 +142,13 @@ composites {
     score = 0.0;
     policy = "remove_weight";
   }
+  BROKEN_HEADERS_MAILLIST {
+    description = "Negate BROKEN_HEADERS when message comes via some mailing list";
+    expression = "BROKEN_HEADERS & -MAILLIST";
+    score = 0.0;
+    policy = "remove_weight";
+  }
+
 
   .include(try=true; priority=1; duplicate=merge) "$LOCAL_CONFDIR/local.d/composites.conf"
   .include(try=true; priority=10) "$LOCAL_CONFDIR/override.d/composites.conf"