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
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 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
Create build-aux/m4 dir. Move m4 scripts for out-of-src builds.
Remove pkg.m4 script. Readibility and fixes AC_CONFIG macro
calls in configure.ac. Add warnings for autoreconf. Update .gitignore.