Refactor how libraries are checked for connect() function, follow-up.

Refactor how libraries are checked for connect() function,
and check for connect() as it is done for other functions.

sclose() function-like macro definition used to close a socket,
now solely based on HAVE_CLOSESOCKET and HAVE_CLOSESOCKET_CAMEL
config file preprocessor definitions.

check for socket() and closesocket() as it is done for other functions

socket() and closesocket() prototypes might be in socket.h

check for socket() and closesocket() as it is done for other functions

  (no newline translations). Use -B/--use-ascii if you rather get the ascii
  approach.

  provided in the url, add it there (squid needs this).

  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