P2MS create transaction example

This transaction creates P2WSH output locking coins in a 2-out-of-3 multisignature script. See tx/multisig_redeem.pl example for spending script.

This code was used to produce testnet transaction: https://mempool.space/testnet/tx/59eb3933d805ca4d75f0ffcf9323a4588903d8d11d9942ed6d5f7e1298621518