[SGVLUG] Proper handling of 301 redirects

[Braddock]

I have a need for HTTP redirects.

A 301 redirect includes a "Location:" HTTP header with the new URL - as 
far as I can tell it is specified that this must be a fully qualified 
URL including host name.

My server is not necessarily smart enough to know its full host name - 
it may be accessed via a NAT firewall forward, be multi-homed, it may 
just be mis-configured, think it is "localhost", be a reverse proxy, 
etc.  At any rate, this seems to be a point of woe I keep running into.

Is there a better way to re-direct where I can use relative URL paths 
without having to worry about the hostname?

-braddock