This allows curl(1) to be used as a client-side tunnel for arbitrary stream
  protocols by abusing chunked transfer encoding in both the HTTP request and
  HTTP response.  This requires server support for sending a response while a
  request is still being read, of course.

  If attempting to read from stdin returns EAGAIN, then we pause our sender.
  This leaves curl to attempt to read from the socket while reading from stdin
  (and thus sending) is paused.

pointed out!

Remove HAVE_CONFIG_H definition from here,
CFLAGS from common.dj already defines it.

add default USE_CURLDEBUG setting

initial step towards decoupling c-ares from libcurl for DOS

improve usability with UNIX-like shells or a DOS command interpreters

don't ignore these subdirs, they must be removed first

fix comment

Try to make more clear that --enable-curldebug has nothing to do with --enable-debug for this library.

Revert last change, it is inappropriate.

fix compiler warning

Fixed to take in account the different interpretation of double
quootes on UNIX-like shells vs DOS-like command interpreters.

include <limits.h> for INT_MAX definition

fix compiler warning

fix compiler warning

when running automake copy missing files instead of symlinking them

DOS adjustments

added header inclusion guard

mention configure --enable-curldebug decoupled from --enable-debug

changed testcurl script to allow building test harness
programs when cross-compiling for a *-*-mingw* host.

  contributed a range of patches to fix them.

With the curl memory tracking feature decoupled from the debug build feature,
CURLDEBUG and DEBUGBUILD preprocessor symbol definitions are used as follows:

CURLDEBUG used for curl debug memory tracking specific code (--enable-curldebug)

DEBUGBUILD used for debug enabled specific code (--enable-debug)

with the low-level curl debug memory tracking 'feature' to allow decoupled
setting from --enable-debug.