Restrict/Deny access to all paths starting with _

[Smrchy]

Hi,
this is probably a noob question but i'm wondering what would be the best
way to

allow access to a directory e.g.:

location /foo {
   ...
}

this will allow access to

/foo
/foo/bar
/foo/bar/somefile.txt

But now i want to deny access to everything starting with /foo/_

/foo/_

so for example

/foo/_users
/foo/_secrets/something.htm
etc.

those should not be accessible.
What is the most efficient way to do this?
Thx
Patrick
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