I fell over this bug report that mentioned that libcurl could wrongly
send more than one complete messages at the end of a transfer. Reading
the code confirmed this, so I've added a new multi state to make it not
happen. The mentioned bug report was made by Brad Jorsch but is (oddly
enough) filed in Debian's bug tracker for the "wmweather+" tool.

Bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=593390

"1.13 curl's ECCN number" is a new section mostly made up from
Alessandro Vesely's very informative ML post on the subject:
http://curl.haxx.se/mail/lib-2008-03/0251.html

Add a call to Curl_pgrsSetUploadSize in this case valided by a test
case.

Reported by: Никита Дорохин.
Bug: http://curl.haxx.se/mail/lib-2010-04/0173.html

In some situations, libtool will change directories and perform
a link step before executing the libtest test app. Since
LD_PRELOAD is in effect for this entire process, the path to the
binary must be absolute so it will be valid no matter in which
directory the app is running.

There's an error in http_negotiation.c where a mistake is using only
userpwd even for proxy requests. Ludek provided a patch, but I decided
to write the fix slightly different using his patch as inspiration.

Reported by: Ludek Finstrle
Bug: http://curl.haxx.se/bug/view.cgi?id=3046066

This allows a test to be run several times in the same test
session even when the -k option is given.

When detecting that the send or recv speed, the multi interface changes
state to TOOFAST and previously there was no timeout set that would
force a recheck but it would rely on the application to somehow call
libcurl anyway. This now sets a timeout for a suitable future time to
check again if the average transfer speed is then below the threshold
again.

Curl_expire() is now expanded to hold a list of timeouts for each easy
handle. Only the closest in time will be the one used as the primary
timeout for the handle and will be used for the splay tree (which sorts
and lists all handles within the multi handle).

When the main timeout has triggered/expired, the next timeout in time
that is kept in the list will be moved to the main timeout position and
used as the key to splay with. This way, all timeouts that are set with
Curl_expire() internally will end up as a proper timeout. Previously any
Curl_expire() that set a _later_ timeout than what was already set was
just silently ignored and thus missed.

Setting Curl_expire() with timeout 0 (zero) will cancel all previously
added timeouts.

Corrects known bug #62.

When we specify the "insert after" entry as NULL, this function now
inserts the new entry first in the list.

Instead of looping over all attached easy handles, this now keeps a list
of messages in the multi handle. It allows curl_multi_info_read() to
perform O(1) no matter how many easy handles that are handled. This is
of importance since this function may be polled very frequently by apps
using the multi interface.

original bug report at https://bugzilla.redhat.com/622520

Otherwise, variables from tests could affect the servers
themselves.

original bug report at https://bugzilla.redhat.com/617757

Due to the layout of the singletest function there are situations where
it returns before it clears the environment variables that were
especially set for the single specific test case. That could lead to
subsequent tests getting executed with environment variables sticking
around from a previous test which could lead to badness.

This change makes sure to clear all custom variables that may be laying
around from a previous round, before running a test case.

Reported by: Kamil Dudka
Bug: http://curl.haxx.se/mail/lib-2010-08/0141.html

warning: conversion to 'long int' from 'time_t' may alter its value

... on win64 when time_t is 64bit and long is 32bit.

The callbacks are called when curl_multi_socket_action() is called, not
when handles are added. This is now mentioned in the "TYPICAL USAGE"
section.

When the progress callback is called during the TCP connection, an error
return would accidentally not abort the operation as intended but would
instead be counted as a failure to connect to that particular IP and
libcurl would just continue to try the next. I made singleipconnect()
and trynextip() return CURLcode properly.

Added bonus: it corrected the error code for bad --interface usages,
like tested in test 1084 and test 1085.

Reported by: Adam Light
Bug: http://curl.haxx.se/mail/lib-2010-08/0105.html

Final fix (hopefully!) for dll wlink loader;
prefer faster internal rm if available.

Added the -br switch to dynamic builds which fixes the issue I saw
with curl's --version output. Added debug info and symfile for debug
builds to linker opts. Added DLL loader for wlink back, but this time
dependend on wlink version.
Patch posted to the list by malak.jiri AT gmail.com.

The var %MAKEFLAGS is only set in 3 cases: if set as environment
var or as macro definition from commandline, and either with the
-u or -ms switch. Since all these cases are unlikely for the average
user it should be safe to only test if %MAKEFLAGS is defined; this
has the benefit that now all other switches can be used again in
addition to the -u which was formerly not possible.

Curl_llist_init is never used outside of llist.c and thus it should be
static. I also removed the protos for Curl_llist_insert_prev and
Curl_llist_remove_next which are functions we removed from llist.c ages
ago.