remove unused class CAddrMan; from db.h
Make CCryptoKeyStore::Unlock check all keys.

CCryptoKeyStore::Unlock has a loop to attempt decrypting each key which
 only executes once, likely due to a simple mistake when the code was
 originally written.

This patch fixes the behavior by making it check all keys. It also adds
 a fatal assertion in the case some decrypt but some do not, since that
 indicates that the wallet is in some kind of really bad state.

This may make unlocking noticeably slower on wallets with many keys.
Dont run full check every time we decrypt wallet.
[Qt] Revert overviewpage from QFormLayout to QVBoxLayout
Univalue: Do not build JSON escape list at runtime

No need to waste startup time building something that can be done
at compile time.

This also resolves a clang++ warning originally reported in #4714,
univalue/univalue_write.cpp:33:12: warning: array subscript is of type 'char
escapes['"'] = "\\"";
^~~~

etc.
build: add option for reducing exports (v2)

This was committed previously as 4975ae172 and reverted, because the flags were
applied even if the checks didn't pass. This is the same commit, fixed up to
actually disable the functionality when necessary.

Enabled automatically if boost >= 1.49.
See: https://svn.boost.org/trac/boost/ticket/2309

Also, check for a default visibility attribute, so that we can mark future
api functions correctly.
Merge branch '2014_univalue_warn' into merge-PR4715

Merge pull request #4715
Merge pull request #4725

e432a5f build: add option for reducing exports (v2) (Cory Fields)
Merge pull request #4672

22b3c4b remove unused class CAddrMan; from db.h (Philip Kaufmann)
Merge pull request #4670

a35b55b Dont run full check every time we decrypt wallet. (Matt Corallo)
1e21c17 Make CCryptoKeyStore::Unlock check all keys. (Gregory Maxwell)
Don't reveal whether password is <20 or >20 characters in RPC

As discussed on IRC.

It seems bad to base a decision to delay based on the password length,
as it leaks a small amount of information.
Add "it works" test for bitcoin-tx
bitcoin-tx: Accept input via stdin. Add input handling to tests.
Merge pull request #4624
Merge pull request #4728 from laanwj/2014_08_rpcserver_password_delay

Don't reveal whether password is <20 or >20 characters in RPC
Merge pull request #4717 from cozz/cozz8

[Qt] Revert overviewpage from QFormLayout to QVBoxLayout
Build libbitcoinscript.a, start refactoring script files.

The goal here is to move towards a C-callable libbitcoinscript.so
that any reimplementation can use for its script exectuion instead
of reimplementing it from scratch, which has been shown to be
incredibly error-prone.

This library will implement basic script parsing and execution, but
it is not the goal to expose things like transaction signing or
script analysis.

The end-goal is to move the things which will be built as a part of
this library to the script/ subfolder, with the exposed API in
script/bitcoinscript.h. Things which are used only by Bitcoin Core
will be in scriptutils.{h,cpp}.
Get a working libbitcoinscript.so build.

This moves a bunch of functions around and, with minimal changes
generates a linkable (though not useful) libbitcoinscript.so.
Make bitcoinscript.h expose useful things
Make bitcoinscript.h C, not C++