experiment: sendfd/recvfd on Windows, part 2/N.
* src/assuan-defs.h (w32_fdpass_send): New. * src/assuan-socket-connect.c (_assuan_connect_finalize) [HAVE_W32_SYSTEM]: Use w32_fdpass_send. * src/system-w32.c (w32_fdpass_send): New.
- GnuPG-bug-id: T6236
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>