Add -zapwallettxes cli/config option, used for wallet recovery

Implement " Add -zapwallettxes cli/config option, used for wallet recovery " from bitcoin source code

https://github.com/bitcoin/bitcoin/commit/518f3bdae3415fdb60cef984b69b36f2633c1fe1

Tested on my local wallet and I was able to recover unconfirmed funds.