The redirect check did not work on Go 1.6 and below because Stat
returned an error for stdout and stderr. In Go 1.7 Stat works on stdout
but doesn't return anything meaningful, causing cmd/geth test failures
because the message is printed to stderr only. Fix it by printing to
stdout only.

(cherry picked from commit b04219fd)

(cherry picked from commit 993b4121)

(cherry picked from commit 2c2e389b)

(cherry picked from commit a87089fd)

(cherry picked from commit 6060e098)

This reverts commit a9c94cbf.

This reverts commit f31a3a25.

This reverts commit aefffc9e.

(cherry picked from commit ba784bdf)

(cherry picked from commit c4de2893)

This implements a generic approach to enabling soft forks by allowing
anyone to put in hashes of contracts that should not be interacted from.
This will help "The DAO" in their endevour to stop any whithdrawals from
any DAO contract by convincing the mining community to accept their code
hash.

(cherry picked from commit 7a5b571c)

(cherry picked from commit ac66d96c)

(cherry picked from commit 861add3d)

(cherry picked from commit ffaf58f0)

Also reduce log messages a little bit.

Text files created on Windows typically have \r\n line endings.
Trim them when reading password files.

- Manager.Accounts no longer returns an error.
- Manager methods take Account instead of common.Address.
- All uses of Account with unkeyed fields are converted.

The account management API was originally implemented as a thin layer
around crypto.KeyStore, on the grounds that several kinds of key stores
would be implemented later on. It turns out that this won't happen so
KeyStore is a superflous abstraction.

In this commit crypto.KeyStore and everything related to it moves to
package accounts and is unexported.

These changes make prompting behave consistently on all platforms:

* The input buffer is now global.
  Buffering was previously set up for each prompt, which can cause weird
  behaviour, e.g. when running "geth account update <input.txt" where
  input.txt contains three lines. In this case, the first password
  prompt would fill up the buffer with all lines and then use only the
  first one.

* Print the "unsupported terminal" warning only once.
  Now that stdin prompting has global state, we can use it to track
  the warning there.

* Work around small liner issues, particularly on Windows.
  Prompting didn't work under most of the third-party terminal emulators
  on Windows because liner assumes line editing is always available.

rpc: be less restrictive on the request id
rpc: improved documentation
console: upgrade web3.js to version 0.16.0
rpc: cache http connections
rpc: rename wsDomains parameter to wsOrigins

This PR introduces a 10% probability that you'll run the client with the
JIT enabled testing the new client and helps us potentially catch
errors when reported.

This feature is **disabled** for miners (disabling the JIT completely).
The JIT can however be force for miners if they enable both --jitvm and
--forcejit.

Added chain configuration options and write out during genesis database
insertion. If no "config" was found, nothing is written to the database.

Configurations are written on a per genesis base. This means
that any chain (which is identified by it's genesis hash) can have their
own chain settings.

This commit serves as a temporary workaround for enabling the jit until
the block customisation PR is merged in.

The EVM is now initialised with an additional configured object that
allows you to turn on debugging options.

Go 1.6 only prints stacks for the current goroutine by default,
but for this panic we want to see all of them.