Update traceroute-geolocation for new geoplugin.net API

git-svn-id: https://svn.nmap.org/nmap@32144 e0a8ed71-7df4-0310-8962-fdc924857419
Make ncat-test.pl work on both Windows and *nix without modification;
feel free to revert it if you believe it needs some discussion first.
(I find it useful when working from both VM and Linux on a shared
directory)

git-svn-id: https://svn.nmap.org/nmap@32156 e0a8ed71-7df4-0310-8962-fdc924857419