ipinfo update.

1) now `y' and `z' keys work when MTR is started without `y' or `z' option

  for example: start mtr then press `y' ...

2) `y/ipinfo' option can accept multiple values

  syntax:
    -y/--ipinfo origin,fields

  examples:

    origin.asn.spameatingmonkey.net: CC, ASN, ORG
    % mtr -4t -y3,5,2,3 hostname

    origin.asn.cymru.com: ASN
    % mtr -4t -y, hostname