dgram: fix abort when getting `fd` of closed dgram

v8's `messages.js` file's `CallSiteGetMethodName` is running through all
object properties and getter to figure out method name of function that
appears in stack trace. This run-through will also read `fd` property of
`UDPWrap` instance's javascript object, making `UNWRAP()` fail.

As a simple alternative to the test case above, one could just keep
reference to the dgram handle and try accessing `handle.fd` after it has
been fully closed.

fix #6536
net: fix `new net.Socket` documentation

`Socket` no longer accepts `type` option, and also accepts `readable`,
`writable` options.

fix #6541
events: do not accept NaN in setMaxListeners
crypto: `randomBytes` is non-blocking

Add NOTE section in documentation, mentioning that `randomBytes` won't
block when entropy sources are drained.

fix #6372
npm: Upgrade to v1.3.15
Merge remote-tracking branch 'upstream/v0.10'

Conflicts:
	lib/events.js
	src/udp_wrap.cc
2013.11.20, Version 0.11.9 (Unstable)

* uv: upgrade to v0.11.15 (Timothy J Fontaine)

* v8: upgrade to 3.22.24.5 (Timothy J Fontaine)

* buffer: remove warning when no encoding is passed (Trevor Norris)

* build: make v8 use random seed for hash tables (Ben Noordhuis)

* crypto: build with shared openssl without NPN (Ben Noordhuis)

* crypto: update root certificates (Ben Noordhuis)

* debugger: pass on v8 debug switches (Ben Noordhuis)

* domain: use AsyncListener API (Trevor Norris)

* fs: add recursive subdirectory support to fs.watch (Nick Simmons)

* fs: make fs.watch() non-recursive by default (Ben Noordhuis)

* http: cleanup freeSockets when socket destroyed (fengmk2)

* http: force socket encoding to be null (isaacs)

* http: make DELETE requests set `req.method` (Nathan Rajlich)

* node: add AsyncListener support (Trevor Norris)

* src: remove global HandleScope that hid memory leaks (Ben Noordhuis)

* tls: add ECDH ciphers support (Erik Dubbelboer)

* tls: do not default to 'localhost' servername (Fedor Indutny)

* tls: more accurate wrapping of connecting socket (Fedor Indutny)
Merge branch 'v0.11.9-release'
Now working on 0.11.10