stream_wrap: use `uv_try_write` where possible

Use `uv_try_write` for string and buffer writes, thus avoiding to do
allocations and copying in some of the cases.
src: only define ssize_t on windows if undefined

This matches how libuv handles the definition of ssize_t, by
typedef'ing intptr_t to ssize_t.

However, in the future we will use portable types from stddef.h
lib: Remove unused var+operations in util.inspect

This was originally introduced in 6034701 to prevent the closing
brace being pushed onto the next line if an object is longer than
the max width, however the functionality was removed in d164989 but
the supplementary variables (and operations) were left behind
lib: fix unnecessary coercion in lib/net.js

Original patch by @skypjack in #6627
deps: update http_parser to 2.2.1

Main changes:

  * Fixed content-length and chunk-size overflow test
node: do not ever close stdio

Even if stdio streams are opened as file streams, we should not ever try
to close them. This could be accomplished by passing `autoClose: false`
in options on their creation.
v8: Upgrade to 3.22.24.19
2014.01.29, Version 0.11.11 (Unstable)

* v8: Upgrade to 3.22.24.19

* http_parser: Upgrade to 2.2.1

* openssl: Upgrade to 1.0.1f

* uv: Upgrade to 0.11.18

* async-listener: revamp of subsystem (Trevor Norris)

* node: do not ever close stdio (Fedor Indutny)

* http: use writev on chunked encoding (Trevor Norris)

* async_wrap/timers: remove Add/RemoveAsyncListener (Trevor Norris)

* child_process: better error reporting for exec (Fedor Indutny)

* crypto: add newline to cert and key if not present (Fedor Indutny)

* crypto: clear error in GetPeerCertificate (Fedor Indutny)

* crypto: honor default ciphers in client mode (Jacob Hoffman-Andrews)

* crypto: introduce .setEngine(engine, [flags]) (Fedor Indutny)

* crypto: support custom pbkdf2 digest methods (Ben Noordhuis)

* domain: fix off-by-one in Domain.exit() (Ryan Graham)

* http: concatenate duplicate headers by default (Alex Kocharin)

* http: do not emit EOF non-readable socket (Fedor Indutny)

* node: fix argument parsing with -p arg (Alexis Campailla)

* path: improve POSIX path.join() performance (Jo Liss)

* tls: emit `clientError` on early socket close (Fedor Indutny)

* tls: introduce `.setMaxSendFragment(size)` (Fedor Indutny)

* tls: make cert/pfx optional in tls.createServer() (Ben Noordhuis)

* tls: process accumulated input (Fedor Indutny)

* tls: show human-readable error messages (Ben Noordhuis)

* util: handle escaped forward slashes correctly (Tom Gallacher)
Merge branch 'v0.11.11-release'
Now working on 0.11.12