--- URI::FTP.build(ary)
--- URI::FTP.build(hash)

    Ϳ줿 URI Ǥ URI::FTP ֥Ȥޤ
    Ǥϡ
      [scheme, userinfo, host, port, path, typecode]
    󤫥ϥåͿޤtypecode ϡ"a""i" 뤤 "d" Ǥ
    "a" ϥƥȡ"i" ϥХʥꡢ"d" ϥǥ쥯ȥɽޤ
    "a" ƥȤǡ"i" ХʥʤΤϡ줾Υǡפ
    FTPΥץȥ ASCII  IMAGE ȸƤФƤǤ

