Change default logout url from / to /home

On logout, you can pass a relative url to redirect to. If the url
passed is not a relative url, or none is passed, we were redirecting
to /. Since that url is now used as the default for posting to upon
login from the account service, change the default logout page redirected
to after deleting session info to /home from /

Using HTTP Rewrite Module if

http://wiki.nginx.org/NginxHttpRewriteModule#if