Fix GetInterfaceByIP()
Fixes for gofmt and vet

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Merge pull request #26 from LK4D4/vet_fmt_fixes

Fixes for gofmt and vet
Merge pull request #25 from YungSang/topic

Fix GetInterfaceByIP()