nix-bitcoin-0.0.38
#325 bitcoind: enable cookie-based authentication (@nixbitcoin)
#326 spark-wallet: fix util-linux evaluation error (@jb55)
#334 bitcoind: secure-node remove assumevalid (@nixbitcoin)
#333 electrs: v0.8.7 -> v0.8.8 (@nixbitcoin)
#332 update nixpkgs-unstable (@nixbitcoin), includes btcpayserver: 1.0.5.9 -> 1.0.6.8 and nbxplorer: 2.1.46 -> 2.1.49