[Rspamd] Create bad header map

data/conf/rspamd/local.d/groups.conf

@@ -9,6 +9,9 @@ symbols {
   "BAD_REP_POLICIES" {
     score = 2.0;
   }
+  "BAD_HEADER" {
+    score = 10.0;
+  }
   "BULK_HEADER" {
     score = 4.0;
   }