fixed a CURLINFO_REDIRECT_URL memory leak and an additional wrong-doing:

  Any subsequent transfer with a redirect leaks memory, eventually crashing
  the process potentially.

  Any subsequent transfer WITHOUT a redirect causes the most recent redirect
  that DID occur on some previous transfer to still be reported.

  eventually identified a flaw in how the multi_socket interface in some cases
  missed to call the timeout callback when easy interfaces are removed and
  added within the same millisecond.

  curl_easy_setopt: CURLOPT_USERNAME and CURLOPT_PASSWORD that sort of
  deprecates the good old CURLOPT_USERPWD since they allow applications to set
  the user name and password independently and perhaps more importantly allow
  both to contain colon(s) which CURLOPT_USERPWD doesn't fully support.

a fresh connection to be made in such cases and the request retransmitted.
This should fix test case 160.  Added test case 1079 in an attempt to
test a similar connection dropping scenario, but as a race condition, it's
hard to test reliably.

  the app re-used the handle to do a connection to host B and then again
  re-used the handle to host A, it would not update the info with host A's IP
  address (due to the connection being re-used) but it would instead report
  the info from host B.

  gets a 550 response back for the cases where a download (or NOBODY) is
  wanted. It still allows a 550 as response if the SIZE is used as part of an
  upload process (like if resuming an upload is requested and the file isn't
  there before the upload). I also modified the FTP test server and a few test
  cases accordingly to match this modified behavior.

  libcurl to somewhat reduce the size of the binary. Run configure
  --disable-proxy.

Curl_resolv_timeout function to reduce coupling.

  downloads!

  CURLINFO_REDIRECT_URL in multi mode" also contained a patch that fixed the
  problem.

returns -1 in EAGAIN cases and that's not valid CURLcode

  with realm="". http://curl.haxx.se/bug/view.cgi?id=2126435

inet_pton function is available.

and when not crosscompiling verifies if it is IPv6 capable.

HAVE_INET_NTOP will only be defined when an IPv6 capable working
inet_ntop function is available.

2008-09-24 stable snapshot have a buf_mem_st.length structure member with
'int' data type.

OpenSSL un-released 0.9.9 CVS version has a buf_mem_st.length structure member
with 'size_t' data type since 2007-Oct-09.

These 4 typecasts should silence compiler warnings in all cases.

switching from one protocol to another in a single request (e.g.
redirecting from HTTP to FTP as in test 1055) by resetting
state.expect100header before every request.

  date parser function. This makes our function less dependent on system-
  provided functions and instead we do all the magic ourselves. We also no
  longer depend on the TZ environment variable.