Handy config snippet: Redirect to canonical server name

[Jeff Waugh]

<quote who="Igor Sysoev">

> This snippet is probably handy, however, it will run useless regex for
> every request for www.example.com. Using separate example.com server is
> better for perfomance reason.

Isn't the regex skipped, given that the if statement doesn't match? I do
remember your note about "if" being a bit hacky atm though, so perhaps not.
:-)

- Jeff

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