Fix FreeBSD Interface Exception

[ghost]

#250

Null is returned by a pregmatch not an empty string.

[kesselb]

Are you able to reproduce this on your box? I would like to add unit tests at some point for the network logic (like we already have for memory and disks) so every breaking input is nice to have ;)

I'm tried one of the reports from the issue but the input seems to work: https://3v4l.org/lPiVo

[ghost]

Are you able to reproduce this on your box? I would like to add unit tests at some point for the network logic (like we already have for memory and disks) so every breaking input is nice to have ;)
I'm tried one of the reports from the issue but the input seems to work: https://3v4l.org/lPiVo

I was able to reproduce the issue by adding a bridge interface.

Checking for the null does work. I also added a default for a null status. Not sure what kind of default to add for mac/ipv4/ipv6.

bridge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:00:00:00:00:00
        id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
        maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
        root id 00:00:00:00:00:00 priority 0 ifcost 0 port 0
        groups: bridge
        nd6 options=9<PERFORMNUD,IFDISABLED>

[kesselb]

/backport to stable20