Use Bech32m encoding for v1+ segwit addresses

This also includes updates to the Python test framework implementation,
test vectors, and release notes.

test/functional/rpc_invalid_address_message.py

@@ -12,8 +12,12 @@ from test_framework.util import (
 )
 
 BECH32_VALID = 'bcrt1qtmp74ayg7p24uslctssvjm06q5phz4yrxucgnv'
-BECH32_INVALID_SIZE = 'bcrt1sqqpl9r5c'
-BECH32_INVALID_PREFIX = 'bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4'
+BECH32_INVALID_BECH32 = 'bcrt1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqdmchcc'
+BECH32_INVALID_BECH32M = 'bcrt1qw508d6qejxtdg4y5r3zarvary0c5xw7k35mrzd'
+BECH32_INVALID_VERSION = 'bcrt130xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqynjegk'
+BECH32_INVALID_SIZE = 'bcrt1s0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7v8n0nx0muaewav25430mtr'
+BECH32_INVALID_V0_SIZE = 'bcrt1qw508d6qejxtdg4y5r3zarvary0c5xw7kqqq5k3my'
+BECH32_INVALID_PREFIX = 'bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx'
 
 BASE58_VALID = 'mipcBbFg9gMiCh81Kj8tqqdgoZub1ZJRfn'
 BASE58_INVALID_PREFIX = '17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem'
@@ -40,6 +44,18 @@ class InvalidAddressErrorMessageTest(BitcoinTestFramework):
         assert not info['isvalid']
         assert_equal(info['error'], 'Invalid prefix for Bech32 address')
 
+        info = node.validateaddress(BECH32_INVALID_BECH32)
+        assert not info['isvalid']
+        assert_equal(info['error'], 'Version 1+ witness address must use Bech32m checksum')
+
+        info = node.validateaddress(BECH32_INVALID_BECH32M)
+        assert not info['isvalid']
+        assert_equal(info['error'], 'Version 0 witness address must use Bech32 checksum')
+
+        info = node.validateaddress(BECH32_INVALID_V0_SIZE)
+        assert not info['isvalid']
+        assert_equal(info['error'], 'Invalid Bech32 v0 address data size')
+
         info = node.validateaddress(BECH32_VALID)
         assert info['isvalid']
         assert 'error' not in info