multiple limit_conn per connection

[bryndole]

I did some more research, ran a few experiments, and even looked at the
code.

What I described above is not possible. The limit_conn method fires
exactly once for a connection, even if it goes to a "@retry" location.
If you have several internal redirects ( rewrite /foo /bar last; )  only
the last limit_conn is fired.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,144501,145154#msg-145154