isisd: initialize circuit to match area is_type

New circuits should be initialized to match the is_type
of their area. Also add an additional check to make sure
that no IIHs are sent for levels which are not enabled.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
2 files changed