Improve link speed fingerprint error reporting
Improve link speed fingerprint error reporting

With disconnected eth0 log output now looks like:

[WARN] fingerprint.network: Unable to parse IP in output of '/bin/ifconfig eth0'
[WARN] fingerprint.network: Unable to parse Speed in output of '/usr/sbin/ethtool eth0'

In a virtual machine:

[WARN] fingerprint.network: Unable to parse Speed in output of '/sbin/ethtool eth0'
[WARN] fingerprint.network: Unable to read link speed from /sys/class/net/eth0/speed

apognu/nomad,achanda/nomad,bscott/nomad,kmalec/nomad,carlosdp/nomad,mattyr/nomad,dvusboy/nomad,novilabs/nomad,iverberk/nomad,barnardb/nomad,dvusboy/nomad,iverberk/nomad,jorgemarey/nomad,macb/nomad,achanda/nomad,mesosphere/nomad,diptanu/nomad,hooklift/nomad,savaki/nomad,kmalec/nomad,frundh/nomad,novilabs/nomad,savaki/nomad,dbresson/nomad,iverberk/nomad,dbresson/nomad,novilabs/nomad,alihalabyah/nomad,mesosphere/nomad,achanda/nomad,alihalabyah/nomad,carlosdp/nomad,mesosphere/nomad,Ashald/nomad,barnardb/nomad,novilabs/nomad,carlosdp/nomad,ranjib/nomad,achanda/nomad,barnardb/nomad,bscott/nomad,burdandrei/nomad,alihalabyah/nomad,Twinuma/nomad,jimmyyan/nomad,savaki/nomad,nak3/nomad,iverberk/nomad,savaki/nomad,xytis/nomad,novilabs/nomad,mattyr/nomad,novilabs/nomad,mattyr/nomad,dvusboy/nomad,dbresson/nomad,Twinuma/nomad,achanda/nomad,Ashald/nomad,macb/nomad,frundh/nomad,ranjib/nomad,diptanu/nomad,jimmyyan/nomad,dbresson/nomad,savaki/nomad,mesosphere/nomad,frundh/nomad,martin416/nomad,burdandrei/nomad,burdandrei/nomad,Twinuma/nomad,Ashald/nomad,mesosphere/nomad,Twinuma/nomad,mesosphere/nomad,mattyr/nomad,bscott/nomad,hashicorp/nomad,jimmyyan/nomad,barnardb/nomad,barnardb/nomad,hooklift/nomad,Twinuma/nomad,apognu/nomad,martin416/nomad,Ashald/nomad,jorgemarey/nomad,mattyr/nomad,jorgemarey/nomad,frundh/nomad,dvusboy/nomad,jimmyyan/nomad,xytis/nomad,frundh/nomad,iverberk/nomad,nak3/nomad,dbresson/nomad,xytis/nomad,Carevoyance/nomad,Carevoyance/nomad,Ashald/nomad,hooklift/nomad,xytis/nomad,martin416/nomad,diptanu/nomad,dbresson/nomad,Ashald/nomad,macb/nomad,burdandrei/nomad,xytis/nomad,diptanu/nomad,Twinuma/nomad,barnardb/nomad,macb/nomad,ranjib/nomad,bscott/nomad,bscott/nomad,Carevoyance/nomad,Carevoyance/nomad,carlosdp/nomad,dvusboy/nomad,mattyr/nomad,frundh/nomad,apognu/nomad,ranjib/nomad,hashicorp/nomad,kmalec/nomad,diptanu/nomad,hooklift/nomad,ranjib/nomad,iverberk/nomad,nak3/nomad,Carevoyance/nomad,bscott/nomad,nak3/nomad,achanda/nomad,Twinuma/nomad,jorgemarey/nomad,apognu/nomad,savaki/nomad,alihalabyah/nomad,nak3/nomad,alihalabyah/nomad,hashicorp/nomad,dvusboy/nomad,jimmyyan/nomad,nak3/nomad,achanda/nomad,Carevoyance/nomad,Ashald/nomad,apognu/nomad,hooklift/nomad,frundh/nomad,burdandrei/nomad,savaki/nomad,barnardb/nomad,jorgemarey/nomad,carlosdp/nomad,nak3/nomad,novilabs/nomad,apognu/nomad,jimmyyan/nomad,carlosdp/nomad,kmalec/nomad,martin416/nomad,martin416/nomad,kmalec/nomad,burdandrei/nomad,hooklift/nomad,macb/nomad,mattyr/nomad,kmalec/nomad,dbresson/nomad,xytis/nomad,macb/nomad,carlosdp/nomad,diptanu/nomad,hashicorp/nomad,hashicorp/nomad,hooklift/nomad,dvusboy/nomad,mesosphere/nomad,jorgemarey/nomad,martin416/nomad,bscott/nomad,iverberk/nomad,hashicorp/nomad,jimmyyan/nomad,ranjib/nomad,burdandrei/nomad,jorgemarey/nomad,apognu/nomad,ranjib/nomad,alihalabyah/nomad,Carevoyance/nomad,kmalec/nomad,macb/nomad,martin416/nomad,diptanu/nomad,xytis/nomad,alihalabyah/nomad