Handle chain server connection errors, if any
Make move and setaccount unsupported methods.

We no longer need to lie about supporting these in the future as they
will be impossible to implement correctly with the upcomming HD
wallet.
Remove plan9 rename function.

This function was misleading because it was actually *not* atomic
(meaning it should have never been used at all where atomicity was
required).  This will break builds on Plan 9 but I consider this fine
to do since the soon-to-be-integrated waddrmgr package relies on bolt
as a database and also does not compile for Plan 9.
revert cafile error handling, continue with nil

This reverts commit 2a5e8587f65cac4780647d80b9e48e9695044b58.
Update for recent btcjson API change.

This commit updates the Tx field of the ListReceivedByAddressResult to
TxIDS to mirror the recent change btcjson.
Refactor txToPairs into smaller functions

Also adds tests for those functions, and improve fee estimation.