The read callback must return the exact requested amount of data when it
is used for doing TFTP uploads. This is due to how it deals with data
internally. This could/should be fixed but for now we document the
existing behavior.

Reported by: Colin Blair
Bug: http://curl.haxx.se/mail/lib-2011-03/0319.html

If a new enough OpenSSL version is used, configure detects the TLS-SRP
support and enables it.

When asked to bind the local end of a connection when doing a request,
the code will now disqualify other existing connections from re-use even
if they are connected to the correct remote host.

This will also affect which connections that can be used for pipelining,
so that only connections that aren't bound or bound to the same
device/port you're asking for will be considered.

The RTSP-specific function for checking for "dead" connection is better
located in rtsp.c. The code using this is now written without #ifdefs as
the function call is instead turned into a macro (in rtsp.h) when RTSP
is disabled.

Added a little generic info section about the lists and a section about
how to deal with trolls and spam on the lists.

Fixed:

271 - fix the IPv6-working probing to only exist at one place in the code and
      only get done once

A problem not repeatable and no proper recipe given and therefore simply
removed for now until we hear something else:

282 - 100 Continue responses should return the "final" HTTP response code:
      "Getting the HTTP response code following a 100 Continue"

Move ipv6-functional-probe into a single function that is used from all
places that need to know.

Make the probe function store the result in a static variable so that
subsequent invokes just returns the previous result and won't have to
probe again.

This is a new documentation for the source tree. This information has
been present since a long time at
http://curl.haxx.se/mail/etiquette.html but now it is put into a plain
text version too for wider distribution. The web version will be
automatically generated from this source document.

Curl_posttransfer is called too soon to add the final new line.
Moved the new line logic to pgrsDone as there is no more call to
update the progress status after this call.

Reported by: Dmitri Shubin <sbn_at_tbricks.com>
http://curl.haxx.se/mail/lib-2010-12/0162.html

This avoids warnings generated by autoconf 2.68.

Signed-off-by: Dave Reisner <d@falconindy.com>

When libcurl sends a HTTP request on a re-used connection and detects it
being closed (ie no data at all was read from it), it is important to
rewind if any data in the request was sent using the read callback or
was read from file, as otherwise the retried request will be broken.

Reported by: Chris Smowton
Bug: http://curl.haxx.se/bug/view.cgi?id=3195205

To reduce the risk of variable name conflicts, use CURLVERSION instead
of VERSION.

Scanned with a tool that checked for mistakes and this is the subsequent
cleanup.

Tiny tweak after Daniel's refactoring of the protocol handlers.

We have an array with the state names only built and used when built
debug enabled and this need to list all the states from the .h

Test 1119 now also makes sure that symbols-in-versions doesn't contain
any duplicates

Slightly modified to become a nicer web page when converted for the site

Added tests for a number of POP3 LIST operations, including one
that shows a curl problem when listing no messages, so is
disabled.

CURLE_CHUNK_FAILED and CURLE_FTP_BAD_FILE_LIST were introduced in
7.21.0, not 7.20.1

Reported by: Andre Guibert de Bruet

Value stored to 'len' is never read

Use (void)[variable] to inhibit unused argument/variables warnings.

Use Curl_ssl_connect_nonblocking() when upgrading the connection to
TLS/SSL while using the multi interface.