curl results

Connection: keep-alive
Location: http://example.com/

:/# curl -I http://example.com
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 15 Mar 2013 07:38:45 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Vary: Accept-Encoding

:/# curl -I http://example.com/
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 15 Mar 2013 07:38:47 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Vary: Accept-Encoding

:/# curl -I http://example.com/sub-site
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Fri, 15 Mar 2013 07:39:05 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Location: http://example.com/sub-site/

:/# curl -I http://example.com/sub-site/
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 15 Mar 2013 07:39:09 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Vary: Accept-Encoding

:/# curl -I http://www.example.com/sub-site
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Fri, 15 Mar 2013 07:39:17 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: http://example.com/sub-site

:/# curl -I http://www.example.com/sub-site/
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Fri, 15 Mar 2013 07:39:21 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: http://example.com/sub-site/