fence_sanbox2: Really add new fence agent + new option login_eol_lf
    
    I forgot to add fence agent in previous patch :(
    
    This option is used for login method using telnet. By default most of the fence agents
    work with username\r\n but on some devices (e.g. HP iLO MP, sanbox2) it is interpreted
    as there is empty password. [from STABLE3 - 819956029c9328a3169ba6cb378b4be16088854b]