6fb2d12373 Get rid of BadFormat error (hashmap)
Pull request description:
add additional variants instead.
as discussed in https://github.com/rust-bitcoin/rust-bitcoin/pull/1365
ACKs for top commit:
Kixunil:
ACK 6fb2d12373
apoelstra:
ACK 6fb2d12373
Tree-SHA512: 2cf9146670c372a3a482448f84a30943cd2ff2fa4e724075d67a52dba5ac0ad38f99ca2af3dd3494e13584653f2b23e913e6421328d40be52e868a107fffe03b