[Users] Trying to understand difference between forward() and t_relay()

[Juan Carlos Castro y Castro]

I was googling for that and found a reply in the SER list that links to 
a page that doesn't exist anymore: 
http://lists.iptel.org/pipermail/serusers/2004-October/011924.html

My searchs have been unsuccesful so far. Can anyone give me a pointer?

Thanks,
Juan