bitcoin/bitcoin

Add some defensive programming on top of #5634.

This copies the respective OpenSSL code in ECDSA_verify in
OpenSSL pre-1.0.1k (e.g. https://github.com/openssl/openssl/blob/OpenSSL_1_0_1j/crypto/ecdsa/ecs_vrf.c#L89)
more closely.

As reported by @sergiodemianlerner.

Github-Pull: #5640
Rebased-From: c6b7b29

Github-Pull: #5634
Rebased-From: 8dccba6

New versions of OpenSSL will reject non-canonical DER signatures. However,
it'll happily decode them. Decode then re-encode before verification in order
to ensure that it is properly consumed.

Github-Pull: #5634
Rebased-From: 488ed32

mmap is proven on the other platforms, we are not changing it at
the last moment before release.

fail on short writes

Ensure new files referred to by the manifest are in the filesystem.

CWalletTx::AddSupportingTransactions() was adding empty transaction
to vtxPrev in some cases. Skip over these.

Part one of the solution to #3190. This prevents invalid vtxPrev from
entering the wallet, but not current ones being transmitted.

Versions of bitcoin before 0.8.6 have a bug that inserted
empty transactions into the vtxPrev in the wallet, which will cause the node to be
banned when retransmitted, hence add a check for !tx.vin.empty()
before RelayTransaction.

Use deleteLater() instead of delete, as it is not allowed
to delete widgets directly in an event handler.
Should solve the MacOSX random crashes on send with coincontrol.

Rebased-From: 6c98cca

WalletView:
- add new signal showNormalIfMinimized()
- emit the new signal in handleURI() to fix a bug, preventing the main
  window to show up when using bitcoin: URIs

Upstream: dbc0a6a

release-process.md

Conflicts:
	doc/release-process.md

One-line change. Fixes #2752.

Conflicts:
	src/core.h

…akefile

This avoids spurious errors with the old tests but still tests
 enough that if the rng is replaced with a totally broken one
 it should still fail.

- fixes src\net.cpp:1601: Error:invalid conversion from 'void*' to
  'const char*' [-fpermissive] in a setsockopt() call on Win32 that was
  found by using MinGW 4.8.1 compiler suite

…BOOST_VERSION is used

Conflicts:
	src/chainparams.cpp

Changes the maximum size of a free transaction that will be created
from 10,000 bytes to 1,000 bytes.

The idea behind this change is to make the free transaction area
available to a greater number of people; with the default 27K-per-block,
just three very-large very-high-priority transactions could fill the space.

Remove the (relay/mempool) rule that all outputs of free transactions
must be greater than 0.01 XBT. Dust spam is now taken care of by making
dusty outputs non-standard.