logrotate for nginx

如果手动编译安装nginx并不会安装logrotate配置。如果用yun安装nginx会自动安装/etc/logrotate.d/nginx配置文件：

/var/log/nginx/*log {
    daily
    rotate 10
    missingok
    notifempty
    compress
    sharedscripts
    postrotate
        [ ! -f /var/run/nginx.pid ] || kill -USR1 `cat /var/run/nginx.pid`
    endscript
}