Fixed bug where pool didn't have subnet
Fixed bug where pool didn't have subnet

This commit fixes a bug where a pool defined using the pool/end
syntax was not given its parent subnet causing panics when the pool
attempt to get the network name for a new lease.

usi-lfkeitel/packet-guardian,packet-guardian/packet-guardian,packet-guardian/packet-guardian,usi-lfkeitel/packet-guardian,packet-guardian/packet-guardian,packet-guardian/packet-guardian,packet-guardian/packet-guardian,usi-lfkeitel/packet-guardian