2005-01-21	fixed include file problem for cygwin
		(thanks to Roland Romero <rolandromero@laposte.net> for
		the bug report)

2004-10-05	ignore return value of shutdown(2) in netio_free()

		pass SHUT_RDWR macro to shutdown(2) instead of constant 2

2004-08-01	changed return type of netio_free() from void to int

2004-07-28	include <sys/socket.h> from netio_timeout.c

		fixed return type of netio_write_line() in netio.h

2004-07-05	added NETIO_OPT_HOOK_HANDLE option

		pass library handle to send/recv hooks in addition to
		app data ptr

2004-06-19	moved BIT_* macros to compat.h

		added NETIO_WRITE_OOB flag to netio_write()

		got rid of n_readp member (not really needed)