message: [wallet] [tests] Test disallowed multiwallet params
  Add a test to check that bitcoind fails to start when specifying
  zapwallettxes, -salvagewallet and -upgradewallet when running in
  multiwallet mode.
  GitHub-Pull:
  Rebased-From:
diff: @@ -56,6 +56,19 @@ class MultiWalletTest(BitcoinTestFramework):
  open(not_a_dir, 'a').close()
  self.assert_start_raises_init_error(0, ['-walletdir=' + not_a_dir], 'Error: Specified -walletdir "' + not_a_dir + '" is not a directory')
  + self.log.info("Do not allow -zapwallettxes with multiwallet")
  + self.assert_start_raises_init_error(0, ['-zapwallettxes', '-wallet=w1', '-wallet=w2'], "Error: -zapwallettxes is only allowed with a single wallet file")
  + self.assert_start_raises_init_error(0, ['-zapwallettxes=1', '-wallet=w1', '-wallet=w2'], "Error: -zapwallettxes is only allowed with a single wallet file")
  + self.assert_start_raises_init_error(0, ['-zapwallettxes=2', '-wallet=w1', '-wallet=w2'], "Error: -zapwallettxes is only allowed with a single wallet file")
  +
  + self.log.info("Do not allow -salvagewallet with multiwallet")
  + self.assert_start_raises_init_error(0, ['-salvagewallet', '-wallet=w1', '-wallet=w2'], "Error: -salvagewallet is only allowed with a single wallet file")
  + self.assert_start_raises_init_error(0, ['-salvagewallet=1', '-wallet=w1', '-wallet=w2'], "Error: -salvagewallet is only allowed with a single wallet file")
  +
  + self.log.info("Do not allow -upgradewallet with multiwallet")
  + self.assert_start_raises_init_error(0, ['-upgradewallet', '-wallet=w1', '-wallet=w2'], "Error: -upgradewallet is only allowed with a single wallet file")
  + self.assert_start_raises_init_error(0, ['-upgradewallet=1', '-wallet=w1', '-wallet=w2'], "Error: -upgradewallet is only allowed with a single wallet file")
  +
  # if wallets/ doesn't exist, datadir should be the default wallet dir
  wallet_dir2 = data_dir('walletdir')
  os.rename(wallet_dir(), wallet_dir2)
  