Using Variable in fastcgi_pass

[Samuel Vogel]

Hey,

I am trying to use a variable in the fastcgi_pass directive. It does not 
get parsed however.

Example:
2008/10/20 12:09:59 [crit] 4475#0: *3 connect() to 
unix:/var/run/php-fpm/socket/$userid failed (2: No such file or 
directory) while connecting to upstream, client: 127.0.0.1, server: 
localhost, request: "GET /info.php HTTP/1.1", upstream: 
"fastcgi://unix:/var/run/php-fpm/socket/$userid:", host: 
"345232.user.domain.net"

Is this not supported? It would be a really important feature to me, 
since it would enable me to not have to reload nginx periodically with a 
new config file!

Regards,
Samy