pass hostname as commandline parameter
Update testfilter.py

1. add option to try all IPs returned by DNS lookup
2. pass hostname as commandline parameter
fix argument condition checking, add option traceroute
fix comments, add project info
fix getips(), getaddrinfo returned duplicated ips, have no idea why. now using popen from os module
Merge pull request #1 from weldan/master

Update testfilter.py