If network interface is specified in the DNS server, then send
the queries to the server via the network interface. Print this
information in the server list.
Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
As the common.h is only meant to be used by the network
shell files, rename it to be more descriptive in order to
avoid possible conflicts with any other common.h file.
Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>