Hi, I'd like to use some if statements in a config. I know if in nginx is evil, but I think it's what I want. Here is the pseudo-nginx-conf-code for what I need: http://pastebin.com/BxrtZ695 — can someone please help me get the syntax right? In english, the idea is: if the requested filename ends with either "F.jpg" or "M.jpg", and another file with almost the same name but the _other_ ending instead does not exist, break/fail.

Thanks for any help!