An alternative would be:

1. specify HTTPS_CA_DIR and/or HTTPS_CA_FILE
2. ensure that Net::SSL is being used, and IO::Socket::SSL is NOT being
   used

This question and answer explain:
http://stackoverflow.com/questions/74358/

Curl_protocol_connect() now does the tunneling through the HTTP proxy if
requested instead of letting each protocol specific connection function
do it.

The check for Winsock definition was a bit too broad

Bug: http://curl.haxx.se/mail/lib-2012-03/0046.html

In line with the manpage, curl-config --libs should only provide the necessary
library flags for the linker in order to compile software with libcurl. Also
with this change, we match what the pkg-config file provides.

Correct some inconsistencies in which version some things were added.

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

Commit 466150bc fixed the Host: header with CONNECT, but I then
forgot the preceeding request-line. Now this too uses [brackets]
properly if a ipv6 numerical address was given.

Bug: http://curl.haxx.se/bug/view.cgi?id=3493129
Reported by: "Blacat"

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.

The line endings broke when I saved the three recent patches (my fault,
not Colin's) to 'git am' them.

Adjusted the stripping of the test program for comparing to also exclude
the SSH key file name as that will differ and use a local path name.

The intention is to take the output of curl's --libcurl option,
as exercised in test 14xx, and generate a corresponding test15xx
in which the generated code is compiled and run.  This will verify
that the generated code behaves equivalently to the original
invocation of the curl command.

The script is not yet integrated into the configure / makefile
machinery.

These tests check the output of the --libcurl option of curl,
including the improved option handling added in a related patch.

This patch improves the output of curl's --libcurl option by
generating code which builds curl_httppost and curl_slist lists, and
uses symbolic names for enum and flag values.  Variants of the
my_setopt macro in tool_setopt.h are added in order to pass extra type
information to the code-generation step in tool_setopt.c.

If curl is configured with --disable-libcurl-option then the macros
call curl_easy_setopt directly.

Fixed a problem in smtp_done() when writing out the postdata as
Curl_write() would periodically return zero bytes written.

Brought in commit 0cf0ab6f

With commit 035ef06b applied, the test pop3 server needs to send
".\r\n" as the body terminating sequence and there needs to be a final
CRLF in the actual body in the test data file.

Curl_pop3_write() would drop the final CRLF of a message as it was
considered part of the EOB as opposed to part of the message. Whilst
the EOB sequence needs to be searched for by the function only the
final 3 characters should be removed as per RFC-1939 section 3.

Reported by: Rich Gray
Bug: http://curl.haxx.se/mail/lib-2012-02/0051.html

Curl_smtp_escape_eob() would leave off final CRLFs from emails ending
in multiple blank lines additionally leaving the smtpc->eob variable
with the character count in, which would cause problems for additional
emails when sent through multiple calls to curl_easy_perform() after a
CURLOPT_CONNECT_ONLY.

Make sure it is mentioned once and with the correct description

Added an extra command-line argument to support the optional AUTH
parameter in SMTPs MAIL FROM command.

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.

Fixed the use of angled brackets "<>" in the optional AUTH parameter as
per RFC-2554 section 5. The address should not include them but an
empty address should be replaced by them.

Added a new CURLOPT_MAIL_AUTH option that allows the calling program to
set the optional AUTH parameter in the MAIL FROM command.

When this option is specified and an authentication mechanism is used
to communicate with the mail server then the AUTH parameter will be
included in the MAIL FROM command. This is particularly useful when the
calling program is acting as a relay in a trusted environment and
performing server to server communication, as it allows the relaying
server to specify the address of the mailbox that was used to
authenticate and send the original email.

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

I accidentally left the lowest bits 01 before

Fixed incorrect behavior in smtp_done() which would cause the end of
block data to be sent to the SMTP server if libcurl was operating in
connect only mode. This would cause the server to return an error as
data would not be expected which in turn caused libcurl to return
CURLE_RECV_ERROR.

We will go straight to 7.25.0 due to the new additions

and updated the end year in the generic copyright string

9 bug fixes, 4 changes and numerous contributors

Bumped release version and option counters

Fix the str2num() function to not check if the input string starts with a
digit, since strtol() supports numbers prepended with '-' (and '+') too.
This makes the --max-redirs option work as documented.

... by making sure that the string is always freed after the invoke as
parse_proxy will always copy the data and this way there's a single
free() instead of multiple ones.

The proxy parser function strips off trailing slashes off the proxy name
which could lead to a mistaken zero length proxy name which would be
treated as no proxy at all by subsequent functions!

This is now detected and an error is returned. Verified by the new test
1329.

Reported by: Chandrakant Bagul
Bug: http://curl.haxx.se/mail/lib-2012-02/0000.html