Update documentation about DOMAIN_NAME variable for Google Translate

app/controllers/application_controller.rb

@@ -35,12 +35,23 @@ def set_translation_cookie
 			cookies.delete(:googtrans, :domain => ".www.#{ENV['DOMAIN_NAME']}")
 
 			# set translation cookie
+
 			# The "DOMAIN_NAME" environment variable should be set
-			# to your app's domain name in production, and to "lvh.me"
-			# in development. Translation won't work with "localhost",
-			# so please open the site locally via http://lvh.me:{port number}
+			# to your app's domain name, without the subdomain.
+			# If you're on Heroku, that means setting it to "herokuapp.com".
+			# If you have a custom domain name, like "www.smc-connect.org", that
+			# means setting it to "smc-connect.org".
+
+			# In development, it should only be set to a 2-level domain name,
+			# like "lvh.me", or "myapp.dev" if you're using Pow. You can set it in
+			# config/application.yml.
+
+			# Translation won't work with "localhost", so please open the site
+			# locally via http://lvh.me:{port number}
+
 			# Read more about lvh.me here:
 			# http://matthewhutchinson.net/2011/1/10/configuring-subdomains-in-development-with-lvhme
+			# Pow should work too if you prefer that: http://pow.cx/
 			cookies[:googtrans] = {
 				value: "/en/#{@current_lang}",
 				domain: "#{ENV['DOMAIN_NAME']}"