Hi,
I want to write using nginx redirect rule for URLs like
http://mysite.com/redirect.php?go=http://external.site/path/page

So I write this

location ~ ^/redirect.php {
rewrite /redirect.php(.*)$ $arg_go? permanent;
}

And it works only for simple URL

But when there is complex URL in GO param,
for example

http://mysite.com/redirect.php?go=http://external.site/script?param=value&param2=value2

It redirects to http://external.site/script
How can I make rule which will redirect user to

http://external.site/script?param=value&param2=value2

P.S. I do not know exact param names for all posible URLs.