btcd v0.6.0-alpha

• Fix an issue when parsing scripts which contain invalid signatures that
  caused a chain fork on block
  0000000000000001e4241fd0b3469a713f41c5682605451c05d3033288fb2244
• Correct an issue which could lead to an error in removeBlockNode
  (btcsuite/btcchain#4)
• Improve addblock utility as follows:
  • Check imported blocks against all chain rules and checkpoints
  • Skip blocks which are already known so you can stop and restart the
    import or start the import after you have already downloaded a portion
    of the chain
  • Correct an issue where the utility did not shutdown cleanly after
    processing all blocks
  • Add error on attempt to import orphan blocks
  • Improve error handling and reporting
  • Display statistics after input file has been fully processed
• Rework, optimize, and improve headers-first mode:
  • Resuming the chain sync from any point before the final checkpoint
    will now use headers-first mode
    (#69)
  • Verify all checkpoints as opposed to only the final one
  • Reduce and bound memory usage
  • Rollback to the last known good point when a header does not match a
    checkpoint
  • Log information about what is happening with headers
• Improve btcctl utility in the following ways:
  • Add getaddednodeinfo command
  • Add getnettotals command
  • Add getblocktemplate command (wallet-specific)
  • Add getwork command (wallet-specific)
  • Add getnewaddress command (wallet-specific)
  • Add walletpassphrasechange command (wallet-specific)
  • Add walletlock command (wallet-specific)
  • Add sendfrom command (wallet-specific)
  • Add sendmany command (wallet-specific)
  • Add settxfee command (wallet-specific)
  • Add listsinceblock command (wallet-specific)
  • Add listaccounts command (wallet-specific)
  • Add keypoolrefill command (wallet-specific)
  • Add getreceivedbyaccount command (wallet-specific)
  • Add getrawchangeaddress command (wallet-specific)
  • Add gettxoutsetinfo command (wallet-specific)
  • Add listaddressgroupings command (wallet-specific)
  • Add listlockunspent command (wallet-specific)
  • Add listlock command (wallet-specific)
  • Add listreceivedbyaccount command (wallet-specific)
  • Add validateaddress command (wallet-specific)
  • Add verifymessage command (wallet-specific)
  • Add sendtoaddress command (wallet-specific)
• Continue cleanup and work on implementing the RPC API:
  • Implement submitblock command
    (#61)
  • Implement help command
  • Implement ping command
  • Implement getaddednodeinfo command
    (#78)
  • Implement getinfo command
  • Update getpeerinfo to support bytesrecv and bytessent
    (#83)
• Improve and correct several RPC server and websocket areas:
  • Change the connection endpoint for websockets from /wallet to /ws
    (#80)
  • Implement an alternative authentication for websockets so clients
    such as javascript from browsers that don't support setting HTTP
    headers can authenticate (#77)
  • Add an authentication deadline for RPC connections
    (#68)
  • Use standard authentication failure responses for RPC connections
  • Make automatically generated certificate more standard so it works
    from clients such as node.js and Firefox
  • Correct some minor issues which could prevent the RPC server from
    shutting down in an orderly fashion
  • Make all websocket notifications require registration
  • Change the data sent over websockets to text since it is JSON-RPC
  • Allow connections that do not have an Origin header set
• Expose and track the number of bytes read and written per peer
  (btcsuite/btcwire#6)
• Correct an issue with sendrawtransaction when invoked via websockets
  which prevented a minedtx notification from being added
• Rescan operations issued from remote wallets are no stopped when
  the wallet disconnects mid-operation
  (#66)
• Several optimizations related to fetching block information from the
  database
• General code cleanup