Correct some inconsistencies in which version some things were added.

Bug: http://curl.haxx.se/bug/view.cgi?id=3494091
Reported by: "curlybugs"

Set the conn->data->info.httpcode variable in smtp_statemach_act() to
allow Curl_getinfo() to return the SMTP response code via the
CURLINFO_RESPONSE_CODE action.

With Colin Hogben's recent work, --libcurl now also works with -F and
more. Remove the previous caveat.

Brought in commit 0cf0ab6f

Make sure it is mentioned once and with the correct description

Added information relating to the new CURLOPT_MAIL_AUTH parameter and
reworked CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT to be a clearer.

Fixed inconsistencies of "vocalisation of the abbreviation" versus
"vocalisation of the first word" for all abbreviations.

Corrected a typo in CURLOPT_NOPROXY.

Modify configure.ac to test for new CyaSSL Init function and remove
default install path to system.  Change to CyaSSL OpenSSL header and
proper Init in code as well.

Note that this no longer detects or works with CyaSSL before v2

We will go straight to 7.25.0 due to the new additions

This new option tells curl to not work around a security flaw in the
SSL3 and TLS1.0 protocols. It uses the new libcurl option
CURLOPT_SSL_OPTIONS with the CURLSSLOPT_ALLOW_BEAST bit set.

Allow an appliction to set libcurl specific SSL options. The first and
only options supported right now is CURLSSLOPT_ALLOW_BEAST.

It will make libcurl to disable any work-arounds the underlying SSL
library may have to address a known security flaw in the SSL3 and TLS1.0
protocol versions.

This is a reaction to us unconditionally removing that behavior after
this security advisory:

http://curl.haxx.se/docs/adv_20120124B.html

... it did however cause a lot of programs to fail because of old
servers not liking this work-around. Now programs can opt to decrease
the security in order to interoperate with old servers better.

Use the new library CURLOPT_TCP_KEEPALIVE rather than disabling this via
the sockopt callback. If --keepalive-time is used, apply the value to
CURLOPT_TCP_KEEPIDLE and CURLOPT_TCP_KEEPINTVL.

This adds three new options to control the behavior of TCP keepalives:

- CURLOPT_TCP_KEEPALIVE: enable/disable probes
- CURLOPT_TCP_KEEPIDLE: idle time before sending first probe
- CURLOPT_TCP_KEEPINTVL: delay between successive probes

While not all operating systems support the TCP_KEEPIDLE and
TCP_KEEPINTVL knobs, the library will still allow these options to be
set by clients, silently ignoring the values.

As is pointed out in this bug report, there can indeed be situation
where --stderr has a point even when the "real" stderr can be
redirected. Remove the superfluous and wrong comment.

bug: http://curl.haxx.se/bug/view.cgi?id=3476020

http://curl.haxx.se/bug/view.cgi?id=3438362

Just showing how to download the contents of a given URL into a local
file.

Based on a suggestion and example code by Georg Potthast

Just to show that IMAP is used just like other protocols

With this change, curl compiles with the new OPENSSL_NO_SSL_INTERN
cflag. This flag might become the default in some distant future.

These examples show how to fetch a single message (RETR command) and how to
list all the messages in a given mailbox (LIST command), with authentication
via SSL.

They were both based on the https.c example.

The INTERNALS document suggested that compatibility should be
maintained with perl version 4, but this was untrue - scripts such as
chksource.pl and runtests.pl use perl5-isms.

It is no longer done blocking in the multi interface

It did a long time ago

1- Two new error codes are introduced.

CURLE_FTP_ACCEPT_FAILED to be set whenever ACCEPTing fails because of
FTP server connected.

CURLE_FTP_ACCEPT_TIMEOUT to be set whenever ACCEPTing timeouts.

Neither of these errors are considered fatal and control connection
remains OK because it could just be a firewall blocking server to
connect to the client.

2- One new setopt option was introduced.

CURLOPT_ACCEPTTIMEOUT_MS

It sets the maximum amount of time FTP client is going to wait for a
server to connect. Internal default accept timeout is 60 seconds.