Rather than set the authentication options as part of the login details
specified in the URL, or via the older CURLOPT_USERPWD option, added a
new libcurl option to allow the login options to be set separately.

- better describe what happens when 1 is specified as parameter
- clarify what "is ignored" means for NSS builds

This patch fixes and issue introduced in commit 7d7df831, if the
tunnel state was TUNNEL_CONNECT, waitconnect_getsock() would return a
bitmask indicating a readable socket but never stored the socket in the
return array.

Due to all the news and changes.

The temporary sockets used for Happy Eyeballs were not closed properly,
if curl exited prematurely, which this patch fixes.

Fixed authentication text due to incorrect digest-uri property.

1) To fix issues with IMAP custom replies
2) So initial space is not required in IMAP display text
3) To be more readable and understandable

As the IMAP regex could fail and $1 would not contain the command id
updated the unrecognised command response to be more generic and
realistic (like those used in the command handlers).

Additionally updated the POP3, SMTP and FTP responses.

Patch-by: "Z98"

This reverts commit 558034ab as it appears to break the auto
builds. More thought is required for this!

The reason for this loop's existence was removed in commit
02fbc26d.

added 85. Wrong STARTTRANSFER timer accounting for POST requests

Our own printf() replacement clearly can't properly handle %.*s with a
string that isn't zero terminated. Instead of fixing the printf code or
even figuring out what the proper posix behavior is, I reverted this
piece of the code back to the previous version where it does malloc +
memcpy instead.

Regression added in e839446c, released in curl 7.32.0.

Reported-by: Felix Yan
Bug: http://curl.haxx.se/bug/view.cgi?id=1295

This patch adds a 200ms delay between the first and second address
family socket connection attempts.

It also iterates over IP addresses in the order returned by the
system, meaning most dual-stack systems will try IPv6 first.

Additionally, it refactors the connect code, removing most code that
handled synchronous connects. Since all sockets are now non-blocking,
the logic can be made simpler.