After discussion with Matt on IRC, this is not ready for prime time
until 2019 and shouldn't have been ACKed and merged.
- Revert "Add systemd service for bitcoind"
This reverts commit 2a87b1b07c.
- Revert "Sync contrib/debian from Matt Corallo's PPA"
This reverts commit 9085532d35.
Tree-SHA512: 439f4ccc3e196011af448b220adf26b0e653ac589bf4cfbbc276c1500c9d08f209c9d6101e4d232857779d9f25164cfb222ed30e3d63de116f9121e6ebde31c3