doc: improve example of process.hrtime()

The example clarifies now that diff[0] * 1000000000 + diff[1] equals
the result in nanoseconds.
dgram: don't assert on send('string')

Raise a TypeError when the argument to send() or sendto() is anything
but a Buffer.

Fixes the following assertion:

  $ node -e 'require("dgram").createSocket("udp4").send("BAM")'
  node: ../../src/udp_wrap.cc:220: static v8::Handle<v8::Value>
  node::UDPWrap::DoSend(const v8::Arguments&, int): Assertion
  `Buffer::HasInstance(args[0])' failed.
  Aborted (core dumped)

Fixes #4496.
object_wrap: add missing HandleScope

by Sven Panne's suggestion, see [0] for details.

[0]: https://code.google.com/p/v8/issues/detail?id=2468
npm: Upgrade to v1.2.0
typed arrays: fix 32 bit size/index overflow

Fix an out-of-bound read/write bug due to integer wrapping. Reported by
Dean McNamee.
2012.01.09, Version 0.8.17 (Stable)

* 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)
Merge branch 'v0.8.17-release' into v0.8
Now working on 0.8.18
blog: Post about v0.8.17
blog: Add security notice to v0.8.17 post
blog: Correct shasums for v0.8.17
blog, changelog: 0.8.17 was released in 2013, not 2012
make binary: allow custom config flags

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"
blog: release v0.9.6
http: fix "Cannot call method 'emit' of null"

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.
tls: allow wildcards in common name

see #4592
buffer: zero-length buffers shouldn't be slab-backed
install: add simplejson fallback

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...
buffer: reject negative SlowBuffer offsets

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

Reported by Trevor Norris.
test: add cluster 'bind twice' test

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 cacd3ae, accidentally reverted in a2851b6.