Fixes #4716.

Inform V8 that the zlib context object is tied to a large off-heap buffer.

This makes the GC run more often (in theory) and improves the accuracy of
--trace_external_memory.

In zlibBuffer(), don't wait for the garbage collector to reclaim the zlib memory
but release it manually. Reduces memory consumption by a factor of 10 or more
with some workloads.

Test case:

  function f() {
    require('zlib').deflate('xxx', g);
  }
  function g() {
    setTimeout(f, 5);
  }
  f();

Observe RSS memory usage with and without this commit. After 10,000 iterations,
RSS stabilizes at ~35 MB with this commit. Without, RSS is over 300 MB and keeps
growing.

Cause: whenever the JS object heap hits the high-water mark, the V8 GC sweeps
it clean, then tries to grow it in order to avoid more sweeps in the near
future. Rule of thumb: the bigger the JS heap, the lazier the GC can be.

A side effect of a bigger heap is that objects now live longer. This is harmless
in general but it affects zlib context objects because those are tied to large
buffers that live outside the JS heap, on the order of 16K per context object.

Ergo, don't wait for the GC to reclaim the memory - it may take a long time.

Fixes #4172.

Using Socket.prototype.connect() to reconnect an existing Socket object
is not reliable. Users should just create a new Socket object.

See #4698.

Fix a small typo in the cluster.settings documentation.

Fix issue where SlowBuffers couldn't be passed as target to Buffer
copy().

Also included checks to see if Argument parameters are defined before
assigning their values. This offered ~3x's performance gain.

Backport of 16bbeccd from master branch. Closes #4633.

Added the word 'has' to the sentence.
Closes #4652.

Handle Z_DATA_ERROR errors from inflateSetDictionary() gracefully.
Fixes the following assertion:

  node: ../src/node_zlib.cc:167: static void node::ZCtx::Process
  (uv_work_t*): Assertion `ctx->err_ == 0 && "Failed to set
  dictionary"' failed.
  Aborted (core dumped)

Fixes #4632.

Handle Z_NEED_DICT errors graciously. Fixes the following assertion:

  node: ../src/node_zlib.cc:161: static void node::ZCtx::Process
  (uv_work_t*): Assertion`ctx->dictionary_ != __null && "Stream
  has no dictionary"' failed.
  Aborted (core dumped)

Fixes #4632.

* npm: Upgrade to v1.2.2

* dns: make error message match errno (Dan Milon)

* tls: follow RFC6125 more stricly (Fedor Indutny)

* buffer: reject negative SlowBuffer offsets (Ben Noordhuis)

* install: add simplejson fallback (Chris Dent)

* http: fix "Cannot call method 'emit' of null" (Ben Noordhuis)

* Allow wildcards only in left-most part of hostname identifier.
* Do not match CN if altnames are present

This reverts commit 30e23704.

Works properly with b4b750b6

This reverts commit 45024e7b.

It's making test/simple/test-tls-check-server-identity.js fail:

  AssertionError: Test#4 failed: { host: 'b.a.com',
    cert: { subject: { CN: '*.a.com' } },
    result: false }
      at <omitted>/test/simple/test-tls-check-server-identity.js:201:10

This test starts two clustered HTTP servers on the same port.
It expects the first cluster to succeed and the second cluster
to fail with EADDRINUSE.

Reapplies commit cacd3ae0, accidentally reverted in a2851b62.

Reject negative offsets in SlowBuffer::MakeFastBuffer(), it allows
the creation of buffers that point to arbitrary addresses.

Reported by Trevor Norris.

Make tools/install.py work with python 2.5

2.5 is still fairly widespread and does not include a json lib as
standard. Most python folk will have simplejson if they are in that
boat.

In general it seems a bit tricky to solve this perfectly...

see #4592

Fix the following exception:

  http.js:974
    this._httpMessage.emit('close');
                      ^
  TypeError: Cannot call method 'emit' of null
      at Socket.onServerResponseClose (http.js:974:21)
      at Socket.EventEmitter.emit (events.js:124:20)
      at net.js:421:10
      at process._tickCallback (node.js:386:13)
      at process._makeCallback (node.js:304:15)

Fixes #4586.

For example, to cross-compile from my OS X laptop for Raspberry Pi, you would
do something like:

  $ make binary BINARYNAME=node-v`python tools/getnodeversion.py`-linux-arm-pi \
      DESTCPU=arm CONFIG_FLAGS="--dest-os=linux"

* npm: Upgrade to v1.2.0
  - peerDependencies (Domenic Denicola)
  - node-gyp v0.8.2 (Nathan Rajlich)
  - Faster installs from github user/project shorthands (Nathan Zadoks)

* typed arrays: fix 32 bit size/index overflow (Ben Noordhuis)

* http: Improve performance of single-packet responses (Ben Noordhuis)

* install: fix openbsd man page location (Ben Noordhuis)

* http: bubble up parser errors to ClientRequest (Brian White)

Fix an out-of-bound read/write bug due to integer wrapping. Reported by
Dean McNamee.