Gracefully handle unreadable /sys/class/net/dev/ nodes
Gracefully handle unreadable /sys/class/net/dev/ nodes

Fixes https://bugs.gentoo.org/629228
Fixes #189
Fixes #185
Fixes #178

dwfreed/openrc,dwfreed/openrc,williamh/openrc,OpenRC/openrc,williamh/openrc,OpenRC/openrc,dwfreed/openrc,OpenRC/openrc,williamh/openrc