52f9c13358 Implement Copy for Address and AddressInner (tushar994)
Pull request description:
solves #4237
ACKs for top commit:
apoelstra:
ACK 52f9c13358c97c358543f3302b325f37ac49392f; successfully ran local tests
Tree-SHA512: 007092c57b893cfa62a6185c21b8839daf946a5b8ca505fc7d5f3b78c056fc5ce44cfb32936469f1955d535f4798506ea20a936218f0bf6808b17506e87836f2