--- send(mesg, flags[, to])

    åȤ𤷤ƥǡޤflags ˴ؤƤ 
    send(2) 򻲾ȤƤconnect Ƥʤå
    ФƤǤ to ꤹɬפޤºݤ
    ǡĹ֤ޤ

    to ˤϥåȥɥ쥹¤Τ pack ʸ
    ꤷޤ

    ǡ˼Ԥ㳰 Errno::EXXX ȯޤ

