Handle www to non-www redirect.

A secundary `server` block has been added. It'll listen on the `www`
host and redirect to the `non-www` host.

nginx/nginx.conf

@@ -87,14 +87,28 @@ http {
   # You should use virtual hosts and move these `server` blocks in their own
   # file inside a `sites-available` folder. Then symink back to `sites-enabled`
   # to activate.
+
+  # www to non-www redirect -- duplicate content is BAD:
+  # https://github.com/h5bp/html5-boilerplate/blob/5370479476dceae7cc3ea105946536d6bc0ee468/.htaccess#L362
+  # Choose between www and non-www, listen on the *wrong* one and redirect to
+  # the right one -- http://wiki.nginx.org/Pitfalls#Server_Name
+  server {
+    # don't forget to tell on which port this server listens
+    listen 80;
+    # listen on the www host
+    server_name www.example.com
+    # and redirect to the non-www host (declared below)
+    return 301 $scheme://example.com$request_uri;
+  }
+
   server {
     # listen 80 default_server deferred; # for Linux
     # listen 80 default_server accept_filter=httpready; # for FreeBSD
     listen 80 default_server;
 
-    # e.g. "localhost" to accept all connections, or "www.example.com"
-    # to handle the requests for "example.com" (and www.example.com)
-    # server_name www.example.com;
+    # listen on the non-www host -- the www-host is declared above and redirects
+    # here
+    server_name example.com;
 
     # Path for static files
     root /sites/example.com/public;