[Click] Could configure NAT in user level?

[Dongyu Yang]

Hello!
    I want to test NAT in click, so I use the NAT configure file
conf/mazu-nat.click, but when I run it in user level:
        click  conf/mazu-nat.click

but the click report the error:
       conf/mazu-nat.click:84: undeclared element 'ToHostSniffers', assuming
element class

    I found the ToHostSniffers element belong to linuxmodule, but I compile
click in userlevel, so it report the eror!

    I want to know how counld I configure NAT in userlevel?

   Thanks for your help!