authentication support: work has begun!

[Jason A. Donenfeld]

On Wed, Jan 15, 2014 at 7:29 PM, Jason A. Donenfeld <Jason at zx2c4.com> wrote:
> On Wed, Jan 15, 2014 at 7:17 PM, Peter Wu <lekensteyn at gmail.com> wrote:
>> The current login page is cachable, you should add "Cache-Control: private" to
>> prevent that.
>
> Excellent idea.

I've added no-cache, no-store to the login page and the redirection.

I've also merged this to master. Please test, and send any fixes you find!