--- BasicSocket.do_not_reverse_lookup
--- BasicSocket.do_not_reverse_lookup = bool
    ͤʤ饢ɥ쥹ۥ̾ؤεհԤʤʤޤ
    ǥեȤ false ǤŪ˺Ѥޤ

    ʲΥ᥽åɤư˱ƶޤ

    BasicSocket#recv [BasicSocket/recv],
    IPSocket#recvfrom [IPSocket/recvfrom],
    UNIXSocket#recvfrom [UNIXSocket/recvfrom],
    Socket#recvfrom [Socket/recvfrom],
    IPSocket#addr [IPSocket/addr],
    IPSocket#peeraddr [IPSocket/peeraddr],
    Socket.getaddrinfo

    :

        require 'socket'

        p TCPSocket.new('localhost', 'telnet').addr
        TCPSocket.do_not_reverse_lookup = true
        p TCPSocket.new('localhost', 'telnet').addr

        => ["AF_INET", 2253, "localhost", "127.0.0.1"]
           ["AF_INET", 2254, "127.0.0.1", "127.0.0.1"]

