Patch-by: "Z98"

All C and H files now (should) feature the proper project curl source
code header, which includes basic info, a copyright statement and some
basic disclaimers.

The CheckTypeSize module that comes with CMake 2.6.2 and above does
everything we need and also supports cross-compiling.  Avoid duplicating
an older version of it here.  This also fixes a cross-compiling error
because the old line

  include ("${CMAKE_MODULE_PATH}/CheckTypeSize.cmake")

failed because CMAKE_MODULE_PATH is a search path and not a directory.

Signed-off-by: Brad King <brad.king@kitware.com>

Make sure <sys/socket.h> is included if around when testing/using
socklen_t.  Also, disable LDAP if LDAP_H is not found on the system.

replaced tabs with spaces

removed trailing whitespace

BUG: curl did not build with cmake with VS 2005 for two reasons, ws2tcpip.h requires winsock2.h to be included before it with that compiler, and wldap32 is not available with the default install of the compiler, so disable ldap support if that is not found

Initial CMake scripts (libcurl only), based on the merge of tetest scripts and mine. These are far to be functionnal yet.
PS: Hello world :)