plugin/bind: tweak error messages (#4532)
plugin/bind: tweak error messages (#4532)

When the interface doesn't exist you get:

plugin/bind: not a valid IP address: eth0

Fix the wording that this can also be interface name. Also %q the
argument in the error mesg.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>
yongtang/coredns,coredns/coredns,chrisohaver/coredns