docs: process.on('exit') receives exit code

The fact that the "exit" event passes the exit code as an argument
as omitted from the documentation. This adds the explanation and
augments the example code to show that.
doc: clarify process on exit safe usage
doc: document that `process.send` is synchronous

Ref #2598
Merge remote-tracking branch 'upstream/v0.10'
v8: Upgrade to 3.22.24.10
2013.12.31, Version 0.11.10 (Unstable)

* http_parser: update to 2.2

* uv: Upgrade to v0.11.17

* v8: Upgrade to 3.22.24.10

* buffer: optimize writeInt* methods (Paul Loyd)

* child_process: better error handling (Alexis Campailla)

* cluster: do not synchronously emit 'setup' event (Sam Roberts)

* cluster: restore backwards compatibility and various fixes (Sam Roberts)

* crypto: remove unnecessary OpenSSL_add_all_digests (Yorkie)

* crypto: support GCM authenticated encryption mode. (Ingmar Runge)

* dns: add resolveSoa and 'SOA' rrtype (Tuğrul Topuz)

* events: move EE c'tor guts to EventEmitter.init (Bert Belder)

* http: DELETE shouldn't default to chunked encoding (Lalit Kapoor)

* http: parse the status message in a http response. (Cam Swords)

* node: fix removing AsyncListener in callback (Vladimir Kurchatkin)

* node: follow specification, zero-fill ArrayBuffers (Trevor Norris)

* openssl: use ASM optimized routines (Fedor Indutny)

* process: allow nextTick infinite recursion (Trevor Norris)

* querystring: remove `name` from `stringify()` (Yorkie)

* timers: setImmediate v8 optimization fix (pflannery)

* tls: add serialNumber to getPeerCertificate() (Ben Noordhuis)

* tls: reintroduce socket.encrypted (Fedor Indutny)

* tls: fix handling of asterisk in SNI context (Fedor Indutny)

* util: Format negative zero as '-0' (David Chan)

* vm: fix race condition in timeout (Alexis Campailla)

* windows: fix dns lookup of localhost with ipv6 (Alexis Campailla)
Merge branch 'v0.11.10-release'
Now working on 0.11.11
blog: Post for v0.11.10
Merge remote-tracking branch 'upstream/v0.10'
node: change AsyncListener API

There was a flaw in the old API that has been fixed. Now the
asyncListener callback is now the "create" object property in the
callback object, and is optional.
node: properly check uid when adding AsyncListener

Instead of checking the uid on the array index of the queue, instead the
object property "uid" was checked on the queue iteself. Because this
will always evaluate to "undefined" the same listener could be added
multiple times to the same context.
crypto: introduce .setEngine(engine, [flags])
doc: Add forward secrecy section to TLS docs

This fixes confusion connected to comparison of ECDH
with RSA and wrong information on forward secrecy.
stream: writes may return false but forget to emit drain

If a write is above the highWaterMark, _write still manages to
fully send it synchronously, _writableState.length will be adjusted down
to 0 synchronously with the write returning false, but 'drain' will
not be emitted until process.nextTick.

If another small write which is below highWaterMark is issued before
process.nextTick happens, _writableState.needDrain will be reset to false,
and the drain event will never be fired.

So we should check needDrain before setting it up, which prevents it
from inproperly resetting to false.
npm: Upgrade to 1.3.23
build: unconditionally disable -Werror

Forcibly disable -Werror, the old { 'werror': '' } hack in node.gyp
no longer works with newer versions of V8.

We support a wide range of compilers, it's simply not feasible to
squelch all warnings, never mind that the libraries in deps/ are
not under our control.

Fixes #6817.
uv: Upgrade to v0.10.22
deps: update openssl to 1.0.1f
doc: fix typo in cluster page