libcurl build: use correct dir when cd'ing to opts for pdf building

opts: initial makefile

with a bonus first rough 'mancheck' target to see which man pages that
are still missing

build: distribute and install libcurl.m4 by default

Manpage for curl_multi_wait().

symbols.pl: provide LIBCURL_HAS macro for apps

Experience has shown that the symbols-in-versions file is very useful to
applications that want to build with a wide range of libcurl versi

symbols.pl: provide LIBCURL_HAS macro for apps

Experience has shown that the symbols-in-versions file is very useful to
applications that want to build with a wide range of libcurl versions.
It is however easy to get it wrong and the source gets a bit messy with
all the fixed numerical comparisions.

The point of this script is to provide an easy-to-use macro for libcurl-
using applications to do preprocessor checks for specific libcurl
defines, and yet make the code clearly show what the macro is used for.

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source header: added to more files

remove the CVSish $Id$ lines

split off curl_multi_socket_action() into its own separate man page as this is
the function we should use, while both curl_multi_socket() and
curl_multi_socket_all() should be killed!

include the symbols-in-versions file in the release archive

- Introducing curl_easy_send() and curl_easy_recv(). They can be used to send
and receive data over a connection previously setup with curl_easy_perform()
and its CURLOPT_CONNECT_ONLY opt

- Introducing curl_easy_send() and curl_easy_recv(). They can be used to send
and receive data over a connection previously setup with curl_easy_perform()
and its CURLOPT_CONNECT_ONLY option. The sendrecv.c example was added to
show how they can be used.

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Introducing curl_easy_pause() and new magic return codes for both the read
and the write callbacks that now can make a connection's reading and/or
writing get paused.

The new file docs/libcurl/ABI describes how we view ABI breakages, soname
bumps and what the version number's significance to all that is.

[Hiper-related work] Added a function called curl_multi_assign() that will
set a private pointer added to the internal libcurl hash table for the
particular socket passed in to this function.

Michael Wallner added curl_formget(), which allows an application to extract
(serialise) a previously built formpost (as with curl_formadd()).

adding the new man pages to the package

First commit of David McCreedy's EBCDIC and TPF changes.

remove getinfo-times from the dist archive since the info is now in the
curl_easy_getinfo man page

Tupone Alfredo's fixes:

1) findtool does look per tool in PATH and think ./perl is the perl
executable, while is just a local directory (I have . in the PATH)

2) I got several w

Tupone Alfredo's fixes:

1) findtool does look per tool in PATH and think ./perl is the perl
executable, while is just a local directory (I have . in the PATH)

2) I got several warning for head -1 deprecated in favour of head -n 1

3) ares directory is missing some file (missing is missing :-) ) because
automake and friends is not run.

(Let's hope number 2 doesn't break somewhere "out there", if so we can always
search/replace that back.)

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David Shaw contributed a fairly complete and detailed autoconf macro you can
use to detect libcurl and setup variables for the protocols the installed
libcurl supports: docs/libcurl/libcurl.m4

curl_easy_reset() documented

libcurl-tutorial.3 is the former libcurl-the-guide converted to man page format

curl_global_init_mem() allows the memory functions to be replaced.
memory.h is included everywhere for this.

removed curl_formparse() from the library

fixed the pdf and html for the strerror functions

added curl_*_strerror