changelog: GnuTLS fix, no reverse loopkups and fixed GSS detection

                                  Changelog

Daniel Stenberg (16 Apr 2010)

- The recent overhaul of the SSL recv function made the GnuTLS specific code

  treat a zero returned from gnutls_record_recv() as an error, and this caused

  our HTTPS test cases to fail. We leave it to upper layer code to detect if

  an EOF is a problem or not.

- I reverted the resolver fix from yesterday and instead removed all uses of

  AI_CANONNAME all over libcurl and made the only user of that info (krb5.c)

  use the host name from the URL instead. No reverse resolving is a good

  thing.

- Paul Howarth made configure properly detect GSS "on ancient Linux distros"

  by editing in which order we use headers to detect GSS.

Daniel Stenberg (15 Apr 2010)

- Rainer Canavan filed bug report #2987196 that identified libcurl doing

  unnecesary reverse name lookups in many cases when built to use IPv4 and

This release includes the following bugfixes:

 o prevent needless reverse name lookups

 o detect GSS on ancient Linux distros

 o GnuTLS: EOF caused error when it wasn't

This release includes the following known bugs:

This release would not have looked like this without help, code, reports and

advice from friends like these:

 Rainer Canavan

 Rainer Canavan, Paul Howarth

        Thanks! (and sorry if I forgot to mention someone)