This adds key file with default settings for the mesh daemon.
The following settings are included:
Beacon: Default setting for to indicate whether
secure network beaconing is enabled for a
node whose Beacon state hasn't been configured
by a configuration client, i.e., this setting
apllies to a newly provisioned, created or
imported node.
Relay: Default setting for supporting relay
Friendship: Default setting for supporting Friendship
CRPL: Default depth of replay protection list.
FriendQueueSize: Default size of friend queue: the number
of messages that each Friend node can store
for the Low Power node.
ProvTimeout: Provisioning timeout in seconds.