* revert confirmations to its original meaning ("Blockchain Confirmations") and also remove bcconfirmations completely
* add new field instantlock (bool) to the RPC output of gettransaction, listtransactions and listsinceblock commands to indicate that tx was locked via InstantSend
* add optional `addlockconf` in addition to `minconf` parameter to all the commands where it makes sense
* fix `wallet.py` test and `vRPCConvertParams` set
* add addlockconf parameter for listreceivedbyaccount/listreceivedbyaddress commands
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