[PULL request] distinguish between different rekey methods

[Kevin Cernekee]

On Fri, Feb 14, 2014 at 12:05 PM, Nikos Mavrogiannopoulos
<nmav at gnutls.org> wrote:
> And I don't think that this complexity is needed. I suppose that an
> AnyConnect server sends "X-DTLS-Rekey: new-tunnel" or does not send this
> header at all? In that case this commit would do the proper thing on
> anyconnect and ocserv.

In my testing I did not see an "X-DTLS-Rekey-Method:" header.  The
three headers listed in my post were the only ones containing "rekey"
(case insensitive).

At some point I'll try a newer ASA firmware and see if anything has changed.