Build enhanced Bitcoin Knots version, rather than Bitcoin Core

Packages describing “knots” as local USE flag

Package “knots” Flag Description
net-p2p/bitcoin-cli Build enhanced Bitcoin Knots version, rather than Bitcoin Core
dev-util/bitcoin-tx Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-libs/libbitcoinconsensus Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoin-qt Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoind Build enhanced Bitcoin Knots version, rather than Bitcoin Core