This increases the minimum CLTV delta allowed for invoice creation to provide more headroom above DefaultFinalCltvRejectDelta (19 blocks). The previous value of 18 was below the reject threshold, which could allow users to create invoices with CLTV deltas that would be rejected when receiving payments.
routing
The routing package implements authentication+validation of channel announcements, pruning of the channel graph, path finding within the network, sending outgoing payments into the network and synchronizing new peers to our channel graph state.
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/routing