54810ce1bfbtcpayserver: add L-BTC support (nixbitcoin)b24c14ec61liquidd: make regtest capable (nixbitcoin)b7225f5d11update nixpkgs-unstable (nixbitcoin) Pull request description: ACKs for top commit: erikarvstedt: ACK54810ce1bfTree-SHA512: 363165d3b977cd4425191bce4246dd9e83daf914bf2adcaf3cf42d0c170f5730e7e79934a97e5f9c071d0f52bf9ee75a3aa710c4c52135ea58bcdd898babcc74