[Cialug] nginx redirect with '?' in uri

[Nicolai]

Hey all,

This is probably super simple: I just want to redirect a single URI, in
nginx, that includes a '?' character.

This works:

location = /blah.php {
	return 302 https://www.example.com;
}

This doesn't work, resulting in a 404 instead of a temp. redirect:

location = /blah.php?s=47 {
	return 302 https://www.example.com;
}

I assume the question mark character is being interpreted as a regular
expression.  I tried escaping it with a '\' character, which didn't
work, and also tried enclosing the whole URI in quotes, which didn't
work either.  Plus some other more dubious things.  What's the solution?

Nicolai