OR conditional usage behavior changed in 0.8.x?

[TECK]

Hi all,

I used to be able to use the OR conditional this way:
location = /(40x|50x).html {
	allow			all;
}

It looks like I cannot use it anymore in 0.8.53 version. Can you please
let me know what is the new type of compact condition I should use
instead?
Thanks for your help.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,155932,155932#msg-155932