--- a/mod_http_upload/mod_http_upload.lua	Sun Oct 18 17:25:40 2015 +0200
+++ b/mod_http_upload/mod_http_upload.lua	Mon Oct 19 17:08:45 2015 +0200
@@ -13,6 +13,7 @@
 local uuid = require"util.uuid".generate;
 local t_concat = table.concat;
 local t_insert = table.insert;
+local s_upper = string.upper;
 
 local function join_path(a, b)
 return a .. package.config:sub(1,1) .. b;