Create function nn_usock_close to handle socket close and PIPE close at the same time.
Add win_error_check_return functin
Storage the nn_epbase parameter in usock_win for named pipe ipc usage under win32.
Fix a typo in ipc.c
Fix a miss check in nn_usock_cancel_io
Remove the warnings.
setsockopt always happens before socket connect and socket bind, that's gives use
an opportunity to implement it with Windows Named Pipe.
Force convert void* to (uint8_t*) for handle pointer add operation.
Use macro instead direct literal.
Add a full functional Named Pipe under win32 with best performance.
 /* FIXME: Setting to very big time when debugging */
Add bld script for win32
Stress test for IPC and TCP.
lighten stress test.
Stress test inner loop found issue.

Conflicts:
	tests/ipc_shutdown.c