Fix improper syntax in list

brackets needed for non-standard table indexing.   Also added a trailing comma as its valid (and more consistent, imo).

httpserver-header.lua

@@ -5,7 +5,7 @@
 return function (connection, code, extension)
 
    local function getHTTPStatusString(code)
-      local codez = {200="OK", 400="Bad Request", 404="Not Found", 501="Not Implemented"}
+      local codez = {[200]="OK", [400]="Bad Request", [404]="Not Found", [501]="Not Implemented",}
       local myResult = codez[code]
       if myResult then return myResult else return "Unknown HTTP Status" end
    end