update http-dec-req-hdr.lua

lua/http-dec-req-hdr.lua

@@ -22,13 +22,14 @@ for k, v in pairs(hdrs) do
     ngx.var._mode = v
   elseif k == 'aceh' then
     ngx.ctx._acehOld = true
+  elseif k == 'level' then
+    ngx.var._level = v
+    ngx.ctx._level = tonumber(v)
   elseif k == 'ext' then
     extHdrs = require('cjson').decode(v)
   else
     if k == 'referer' then
       ngx.var._ref = v
-    else if k == 'cookie' then
-      ngx.ctx._hasCookie = true
     end
     ngx.req.set_header(k, v)
   end