researching it, it turned out he got a 550 response back from a SIZE command
  and then I fell over the text in RFC3659 that says:

   The presence of the 550 error response to a SIZE command MUST NOT be taken
   by the client as an indication that the file cannot be transferred in the
   current MODE and TYPE.

  In other words: the change I did on September 30th 2008 and that has been
  included in the last two releases were a regression and a bad idea. We MUST
  NOT take a 550 response from SIZE as a hint that the file doesn't exist.

(to get correct linkage on Windows).

Added _USE_32BIT_TIME_T to avoid runtime warning. Applies to
VC-2008+ only.

RETSIGTYPE and HAVE_PROCESS_H.

Fixed!

  (http://curl.haxx.se/bug/view.cgi?id=2221237) that identified an infinite
  loop during GSS authentication given some specific conditions. With his
  patience and great feedback I managed to narrow down the problem and
  eventually fix it although I can't test any of this myself!

and I edited it to also get duped by ares_dup().

support (e.g. Minix)

  (http://curl.haxx.se/bug/view.cgi?id=2351645) that identified a problem with
  the multi interface that occured if you removed an easy handle while in
  progress and the handle was used in a HTTP pipeline.

  bad fclose() after a fatal error had occured.
  (http://curl.haxx.se/bug/view.cgi?id=2382219)

Also discussed on the ml.

OpenWatcom C, and condoned by SUS)

latest releases to remain ABI compatible.

OpenWatcom C)

buffer to shrink instead of expand if a reply contained 8 or more records.

with and without --location-trusted

adds 1 to num to get the data section to return. This allows testing
authentication negotiations using the Basic authentication method.

ares_addr union is now changed into an internal struct which also holds
the address family.