4c94695942 Mark funtions const (yancy)
Pull request description:
May as well mark these const as well. Follow up to https://github.com/rust-bitcoin/rust-bitcoin/pull/3605
ACKs for top commit:
apoelstra:
ACK 4c94695942de41e5eca4ac120db2e069c0bb037d; successfully ran local tests; yeah, I think this are all worth consting
tcharding:
ACK 4c94695942
sanket1729:
ACK 4c94695942
Tree-SHA512: bf41e416cb8a2eb90e26d7bd640df5c2a5a868e3b721bde7cc8a3b97c687bab4d1cb4ab1c4b04ed625e8657e25c59e386720cb0f9d735ffc492e98f5b8b2ca3c