This commit adds the block cache to the CfFilteredChainView struct
and wraps its GetBlock function so that block cache mutex map is used
when the call to neutrino's GetBlock function is called.
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