733505148c Add tests for witness_program (Shing Him Ng)
Pull request description:
Add tests for witness_program
ACKs for top commit:
tcharding:
ACK 733505148c
Kixunil:
ACK 733505148c
apoelstra:
ACK 733505148c successfully ran local tests
Tree-SHA512: c1ee82edf22c7b39bc110d03836ba5ebfa785a63185a75c1a61781180ff907c1ea0c491c963629450f360152766845dacedccc6cf56bc3d8c607e66281427dd3