Add TOTP (RFC6238) one-time password support

[Kevin Cernekee]

On Mon, Mar 25, 2013 at 1:41 PM, John Morrissey <jwm at horde.net> wrote:
> On Sat, Mar 23, 2013 at 11:39:58PM +0000, David Woodhouse wrote:
>> On Mon, 2013-03-18 at 23:53 -0400, John Morrissey wrote:
>> > How about this latest version, below?
>>
>> I've made a few tweaks and applied it. I haven't even build-tested it
>> though.
>
> Just tried it, works fine for me(tm). Thanks for accepting the patch.

While we're on the topic - could you please try out the
network-manager-openconnect patches I sent yesterday?  I ran a quick
smoke test but I don't know of any VPNs that request a
"secondary_password" so I can't be 100% sure it's sending a TOTP
password in response.  It would be helpful to verify it end-to-end.

These patches apply to the head of tree from git.gnome.org (which,
contrary to my previous statements, does already have stoken support).

Thanks.