[Fix] Add missing score normalisation for HFILTER_URL_ONLY

 - Issue: #1565
 - Reported by: @moisseev

src/plugins/lua/hfilter.lua

@@ -292,8 +292,9 @@ local function hfilter(task)
         if plen > 0 and url_len > 0 then
           local rel = url_len / plen
           if rel > 0.8 then
-            task:insert_result('HFILTER_URL_ONLY', (rel - 0.8) * 5.0,
-              tostring(rel))
+            local sc = (rel - 0.8) * 5.0
+            if sc > 1.0 then sc = 1.0 end
+            task:insert_result('HFILTER_URL_ONLY', sc, tostring(sc))
             local lines = plain_text_part:get_lines_count()
             if lines > 0 and lines < 2 then
               task:insert_result('HFILTER_URL_ONELINE', 1.00,