'expires epoch' directive causes upstream cache headers to be ignored #198

## The Cache-Control and Expires headers should be delivered untouched
## from the upstream to the client.
fastcgi_ignore_headers Cache-Control Expires;
## Bypass the cache.
fastcgi_cache_bypass $no_cache;
fastcgi_no_cache $no_cache;
## Add a cache miss/hit status header.
add_header X-Micro-Cache $upstream_cache_status;
## To avoid any interaction with the cache control headers we expire
## everything on this location immediately.
expires epoch;
However, the expires epoch line apparently takes precedence over fastcgi_ignore_headers Cache-Control Expires;
Headers with expires epoch;:
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 18 Dec 2014 20:43:48 GMT
Content-Type: application/xml
Connection: keep-alive
Keep-Alive: timeout=10
Vary: Accept-Encoding
Etag: "1418928287-0"
Cache-Control: no-cache
Expires: Thu, 01 Jan 1970 00:00:01 GMT
X-Microcachable: 0
Content-Language: en
Last-Modified: Thu, 18 Dec 2014 18:44:47 GMT
Vary: Cookie
Vary: Accept-Encoding
X-Micro-Cache: EXPIRED
X-Content-Options: nosniff
Identical configuration without expires epoch;:
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 18 Dec 2014 20:44:37 GMT
Content-Type: application/xml
Connection: keep-alive
Keep-Alive: timeout=10
Vary: Accept-Encoding
Etag: "1418928287-0"
Cache-Control: public, max-age=2592000
Expires: Sat, 1 Jan 2015 06:44:48 GMT
X-Microcachable: 0
Content-Language: en
Last-Modified: Thu, 18 Dec 2014 18:44:47 GMT
Vary: Cookie
Vary: Accept-Encoding
X-Micro-Cache: MISS
X-Content-Options: nosniff
It looks like the expires epoch directive is redundant and should be removed.