f3967bcc build: fix build weirdness after 54372482. (Cory Fields)

bitcoin-config.h moved, but the old file is likely to still exist when
reconfiguring or switching branches. This would've caused files to not rebuild
correctly, and other strange problems.

Make the path explicit so that the old one cannot be found.

Core libs use config/bitcoin-config.h.

Libs (like crypto) which don't want access to bitcoin's headers continue
to use -Iconfig and #include bitcoin-config.h.

qa/rpc_tests: Wait for handshake to complete in connect_nodes

This avoids a race condition in which the connection was
made but the version handshake is not completed yet. In that
case transactions won't be broadcasted to a peer yet, and
the nodes will wait forever for their mempools to sync.

3f9a0199 added list/get received by address/ account tests (Alon Muroch)

b3c912d9 [Qt] Change Coin control labels and tooltips because of non-rounding fees (Cozz Lovan)

It is outdated information. If we ever resurrect gitian-downloader it
can be brought back from history and updated.

fa126eff Avoid undefined behavior using CFlatData in CScript serialization (Wladimir J. van der Laan)

`&vch[vch.size()]` and even `&vch[0]` on vectors can cause assertion
errors with VC in debug mode. This is the problem mentioned in #4239.
The deeper problem with this is that we rely on undefined behavior.

- Add `begin_ptr` and `end_ptr` functions that get the beginning and end
  pointer of vector in a reliable way that copes with empty vectors and
  doesn't reference outside the vector
(see https://stackoverflow.com/questions/1339470/how-to-get-the-address-of-the-stdvector-buffer-start-most-elegantly/1339767#1339767).
- Add a convenience constructor to CFlatData that wraps a vector.

I added `begin_ptr` and `end_ptr` as separate functions as I imagine
they will be useful in more places.

3dc1464f add missing vhListenSocket.clear(); to CNetCleanup() (Philip Kaufmann)
2831a03b remove unused CNode::Cleanup() (Philip Kaufmann)

040c2d3f Fix formatting (Drak)

b612bde5 remove unneded class CNodeCombinedStats; from rpcconsole.cpp (Philip Kaufmann)

- also 2 small style fixes

d38da59b Code simplifications after CTransaction::GetHash() caching (Pieter Wuille)
4949004d Add CMutableTransaction and make CTransaction immutable. (Pieter Wuille)

806fd19e Allocate receive buffers in on the fly (Pieter Wuille)

In addition, introduce a cached hash inside CTransaction, to prevent
recalculating it over and over again.

a0495bb6 Add <Hasher>::OUTPUT_SIZE (Pieter Wuille)
4791b99e crypto: create a separate lib for crypto functions (Cory Fields)
f2647cc0 crypto: explicitly check for byte read/write functions (Cory Fields)
54372482 build: move bitcoin-config.h to its own directory (Cory Fields)
3820e01e Extend and move all crypto tests to crypto_tests.cpp (Pieter Wuille)
7ecd9739 Move {Read,Write}{LE,BE}{32,64} to common.h and use builtins if possible (Pieter Wuille)
a5bc9c09 Add built-in RIPEMD-160 implementation (Pieter Wuille)
13b5dfef Move crypto implementations to src/crypto/ (Pieter Wuille)
1cc344ce Add built-in SHA-1 implementation. (Pieter Wuille)
85aab2a0 Switch miner.cpp to use sha2 instead of OpenSSL. (Pieter Wuille)
cf0c47b2 Remove getwork() RPC call (Pieter Wuille)
7b4737c8 Switch script.cpp and hash.cpp to use sha2.cpp instead of OpenSSL. (Pieter Wuille)
977cdade Add a built-in SHA256/SHA512 implementation. (Pieter Wuille)

small cleanup in src/compat .h and .cpp

This lib has no dependencies on other bitcoin functionality. Attempting to
use bitcoin headers will result in a failure to compile.

Don't depend on hard-coded platform lists

This allows us to include its path without making other header includes valid.

This also moves the HMAC-SHA512 implementation to sha2.cpp.

38405ac1 Add comment regarding experimental-use service bits (Peter Todd)
99ddc6cb Add nLocalServices info to RPC getinfo (Peter Todd)

As per mailing list discussion.

Also show full 64 bits of services. Previously service bits >32 that
were advertised just didn't show up at all.