Хочу перейти с apache mod_rewrite на nginx rewrite, раньше было вот так:

[code]
RewriteCond %{HTTP_HOST} ^(www\.)?([0-9a-zA-Z\-]+)\.main\.com$ [NC]
RewriteRule ^$ /user.php?act=user&login=%2 [L]
[/code]

Вот конфиг:

[code]
worker_processes 1;

events
{
worker_connections 2000;
}


http
{
include mime.types;
sendfile on;
keepalive_timeout 65;
server_names_hash_bucket_size 64;

server
{
listen 80;
server_name *.main.test main.test;

location ~ \.php
{
proxy_pass http://127.0.0.1:8080;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

rewrite ^/air$ /feeds.php?act=air last;

client_max_body_size 15m;
charset utf-8;
}
}
[/code]

Как это сделать?