a74393324b Move opcodes back to bitcoin (Tobin C. Harding)
Pull request description:
Duplicate `opcodes` in `bitcoin` and hide it in `primitives` so we do not have to commit to the API.
We use opcodes in `impl fmt::Display for Script`.
Close: #4144
ACKs for top commit:
apoelstra:
ACK a74393324bd47f89fd47281d567ab15ab6bcb2ba; successfully ran local tests; sure
Kixunil:
ACK a74393324b
Tree-SHA512: 738685b9cd2288a581daa6219e3b21bd48bb4845ea627bf6b8085e0e48f5649ac5ec616a3421d10cd37543f76b66d31f94fd55bf94effc2fb8f91d1ecf5c8611