This offers an alternative to the existing Curl_socket_ready() API which
only checks one socket for read and one for write.

When working with the Android Standalone Toolchain the compiler defines
this macro:

  /path/to/arm-linux-androideabi-gcc -E -dM - < /dev/null \
  | grep -i android
  #define __ANDROID__ 1

We really need to check both ANDROID and __ANDROID__ since I've observed
that:

* if you use Android.mk file(s) and the 'ndk-build' script (aka vanilla
way), ANDROID is predefined (see -DANDROID extra C flag),

* if you use the Android Standalone Toolchain, then __ANDROID__ is
predefined as stated by the compiler

As commit ce896875 fixed a timer that accidentally had been moved in
code and then returned a bad timer, the lib500.c code (used in test 500
and some others) now verifies 5 timers against each other to verify that
they have the correct relative values. We cannot compare against
absolute values as the timings will vary a lot.

It makes it easier to introduce debug outputs in this function, and
everything in the function is using the value anyway so it might even be
more efficient.

Regression introduced in 7.23.0 with commit 9dd85bce. The function in
which the PRETRANSFER time stamp was recorded was moved in time causing
it be stored very quickly after the start timestamp. On most systems
shorter than 1 millisecond and thus it wouldn't even show with -w
"%{time_pretransfer}" using the command line tool.

Bug: http://curl.haxx.se/mail/archive-2011-12/0022.html
Reported by: Toni Moreno

Parameters were underquoted, resulting in
warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

The CURLM_CALL_MULTI_PERFORM reference is an old leftover I had to
remove.

I also added some blurb to the previously blank "sharing" section.

Allow, at configure time, the production of versioned symbols. The
symbols will look like "CURL_<FLAVOUR>_<VERSION> <SYMBOL>", where
<FLAVOUR> represents the SSL flavour (e.g. OPENSSL, GNUTLS, NSS, ...),
<VERSION> is the major SONAME version and <SYMBOL> is the actual symbol
name. If no SSL library is enabled the symbols will be just
"CURL_<VERSION> <SYMBOL>".

This gets the appconnect time right for ssl backends, which don't
support non-blocking connects.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>

One new feature, one bug fix. Introduced references in this file for
mentioned issues after this discussion:
http://curl.haxx.se/mail/lib-2011-12/0187.html

The plan is to let the references get moved over to the changes.html
file at release-time

Document the possibility of providing multiple values using the ":"
separator, and the fact that the default value will be ignored if the
option is used.

Test case 1315 was added to verify this functionality. When passing in
multiple files to a single -F, the parser would get all confused if one
of the specified files had a custom type= assigned.

Reported by: Colin Hogben

test 1315 checks correct behaviour when uploading multiple files.
Buggy behaviour has been seen where only two attachments are sent.

Two variable names were wrong in the documentation.

The default content-type for file uploads is application/octet-stream,
not text/plain as stated in the MANUAL.

Avoid 'interface' literal that some MinGW versions define as a macro

Do not try to resolve interfaces names via DNS by recognizing interface
names in a few ways.  If the interface option argument has a prefix of
"if!" then treat the argument as only an interface.  Similarly, if the
interface argument is the name of an interface (even if it does not have
an IP address assigned), treat it as an interface name.  Finally, if the
interface argument is prefixed by "host!" treat it as a hostname that
must be resolved by /etc/hosts or DNS.

These changes allow a client using the multi interfaces to avoid
blocking on name resolution if the interface loses its IP address or
disappears.

5 more bugfixes, 5 more contributors

Fixed the connection reuse detection in ConnectionExists() when
comparing a new connection that is non-SSL based against that of a SSL
based connection that has become so by being upgraded via TLS.

This is a regression since who knows when. When spotting that a HTTP
proxy is used we must not uncondititionally enable the HTTP protocol
since if we do tunneling through the proxy we're still using the target
protocol.

Reported by: Naveen Chandran

As a follow-up from commit d5b5f64b, clear the sock_accepted status
when such a socket is closed to avoid a re-used connection to retain the
state wrongly.

Bug: http://curl.haxx.se/mail/lib-2011-12/0079.html

Starting with some recent OpenSSL versions (1.0.0e was mentioned)
linking with a static openssl requires a set of more libs to be linked
on Windows.

Thanks also to Steve Holme and Martin Storsjö for additional feedback.

Bug: http://curl.haxx.se/mail/lib-2011-12/0063.html
Reported by: Ward Willats

This improves portability of the examples.  This patch was
submitted to the OpenBSD ports collection by naddy.

This is a left-over fix from commit b7e242de that Tom Wright
suggested.

Reported by: Ward Willats

If no SSLv2 was detected in OpenSSL by configure, then we enforce the
OPENSSL_NO_SSL2 define as it seems some people report it not being
defined properly in the OpenSSL headers.

If the option is set to 0, the default timeout will be used - which in
modern libcurl versions equals 300 seconds (== 5 minutes).

Bug: http://curl.haxx.se/mail/lib-2011-12/0051.html
Reported by: Vladimir Grishchenko

Adds a timer based off of CURLINFO_TOTAL_TIME that is used to perform
certain actions after a minimum amount of time has passed using the
progress function. As a consequence the curl handle is now also passed
into the progress function. Progress example now also includes an
example of how to retreive the TOTAL_TIME and print it out.

8 more bugs, 5 more contributors