: new( address, port = 80, proxy_addr = nil, proxy_port = nil )
     HTTP ֥Ȥޤaddress  HTTP С FQDN ǡ
    port ³ݡֹǤΥ᥽åɤǤϤޤ³Ϥޤ

    proxy_addr Ϳȥץ𤷤³륪֥Ȥޤ

