Qt wallets display information to users about the broadcast state
of transactions, without truly knowing the actual state. The fact
that a peer has requested details for a transaction does not mean
it was accepted to their mempool or relayed to any other peers and
miners, because the only way to test if the transaction can be
accepted is by requesting and processing it.
We remove the "offline" and "maturity warning" statuses, which
saves large wallets memory and processing time.
Backported from: beef7ec4
Original author: Matt Corallo <git@bluematt.me>
In anticipation of making all the callbacks out of block processing
flow through it. Note that vHashes will always have something in it
since pindexFork != pindexNewTip.
Continues Johnathan Corgan's work.
Publishing multipart messages
Bugfix: Add missing zmq header includes
Bugfix: Adjust build system to link ZeroMQ code for Qt binaries
Adds a regression test for the wallet's ResendWalletTransactions function, which uses a new, hidden RPC command "resendwallettransactions."
I refactored main's Broadcast signal so it is passed the best-block time, which let me remove a global variable shared between main.cpp and the wallet (nTimeBestReceived).
I also manually tested the "rebroadcast unconfirmed every half hour or so" functionality by:
1. Running bitcoind -connect=0.0.0.0:8333
2. Creating a couple of send-to-self transactions
3. Connect to a peer using -addnode
4. Waited a while, monitoring debug.log, until I see:
```2015-03-23 18:48:10 ResendWalletTransactions: rebroadcast 2 unconfirmed transactions```
One last change: don't bother putting ResendWalletTransactions messages in debug.log unless unconfirmed transactions were actually rebroadcast.
