4300cf2210 Add p2wpkh and p2wsh signature hash functions (Tobin C. Harding)
Pull request description:
The word "segwit" refers to segwit v0 and taproot but these functions are version specific. Add `v0` into the function names.
This is similar to #1994, both based on recent post of mine to bitcoin dev mailing list.
ACKs for top commit:
stevenroose:
ACK 4300cf2210
apoelstra:
ACK 4300cf2210
Tree-SHA512: 723fc302954514da0fa57a3890b9f62e9d8d1b25289b8db00611d8bc34c5000b9e54943f57b8e94befcaf72633ac078b2ff66a1da0c5bb483cfaa584e3cb6014