build: make sure changelog.html is generated
src: use monotonic time for process.uptime()

`process.uptime()` interface will return the amount of time the
current process has been running. To achieve this it was caching the
`uv_uptime` value at program start, and then on the call to
`process.uptime()` returning the delta between the two values.

`uv_uptime` is defined as the number of seconds the operating system
has been up since last boot. On sunos this interface uses `kstat`s
which can be a significantly expensive operation as it requires
exclusive access, but because of the design of `process.uptime()` node
*had* to always call this on start. As a result if you had many node
processes all starting at the same time you would suffer lock
contention as they all tried to read kstats.

Instead of using `uv_uptime` to achieve this, the libuv loop already
has a concept of current loop time in the form of `uv_now()` which is
in fact monotonically increasing, and already stored directly on the
loop. By using this value at start every platform performs at least
one fewer syscall during initialization.

Since the interface to `uv_uptime` is defined as seconds, in the call
to `process.uptime()` we now `uv_update_time` get our delta, divide by
1000 to get seconds, and then convert to an `Integer`. In 0.12 we can
move back to `Number::New` instead and not lose precision.

Caveat: For some platforms `uv_uptime` reports time monotonically
increasing regardless of system hibernation, `uv_now` interface is
also monotonically increasing but may not reflect time spent in
hibernation.
docs: fix links to streams

Signed-off-by: Fedor Indutny <fedor@indutny.com>
child_process: fix deadlock when sending handles

Fix possible deadlock, when handles are sent in both direction
simultaneously. In such rare cases, both sides may queue their
`NODE_HANDLE_ACK` replies and wait for them.

fix #7465
events: check if _events is an own property

Without this check it is possible to have the _events object shared
amongst instances.

Fixes #7157

Signed-off-by: Trevor Norris <trev.norris@gmail.com>
url: treat \ the same as /

See https://code.google.com/p/chromium/issues/detail?id=25916

Parse URLs with backslashes the same as web browsers, by replacing all
backslashes with forward slashes, except those that occur after the
first # character.
npm: upgrade to 1.4.7

* isaacs, Robert Kowalski, Benjamin Coe: Test Improvements
* isaacs doc: Add canonical url
* isaacs view: handle unpublished packages properly
* Raynos (Jake Verbaten) do not log if silent
* Julian Gruber fix no such property error
* isaacs npmconf@0.1.14
* Thorsten Lorenz adding save-prefix configuration option
* isaacs npm-registry-client@0.4.7
* isaacs cache: treat missing versions as a 404
* isaacs cache: Save shasum, write resolved/etc data to cache
* isaacs cache: Always fetch root doc
* isaacs cache: don't repack unnecessarily from tmp
* Andrey Kislyuk Don't crash if shrinkwrap-dependencies were not passed in pkginfo
* Robert Kowalski fix link in faq
* Jean Lauliac Add a peerDependencies section in package.json doc
* isaacs read-installed@2.0.2
tls: set _connecting before starting the flow

When creating a TLSSocket instance based on the existing connecting
socket, `_connecting` property is copied after the initialization of
`net.Socket`. However, since `net.Socket` constructor will call
`.read(0)` if the `readable` is true - error may happen at this code
chunk in net.js:

    Socket.prototype._read = function(n) {
      debug('_read');

      if (this._connecting || !this._handle) {
        debug('_read wait for connection');
        this.once('connect', this._read.bind(this, n));
    ...

Leading to a test failures on windows:

 - test/simple/test-tls-connect-given-socket.js

Signed-off-by: Fedor Indutny <fedor@indutny.com>
tls: support OCSP on client and server
tls: `getPeerCertificate(detailed)`

Add `raw` property to certificate, add mode to output full certificate
chain.
src: lint after OCSP commits
crypto: work around OpenSSL oddness

OpenSSL behaves oddly: on client `cert_chain` contains
the `peer_certificate`, but on server it doesn't.

Signed-off-by: Fedor Indutny <fedor@indutny.com>
crypto: fix memory leak in CipherBase::Final

fix #7497

Signed-off-by: Fedor Indutny <fedor@indutny.com>
doc: tls: added path property to tls.connect

In tls.connect a unix socket connection to a path may be made in
recent versions of node by specifying the value for the path
property.

Signed-off-by: Fedor Indutny <fedor@indutny.com>
Revert "deps: backport b5135bbc from c-ares repo"

This reverts commit 896e19330ad06ace8973c5d7b75d2de538228062.

Proper handling of TXT records requires API change, we can't afford it
in v0.10.

See #7371 for details.
deps: provide TXT chunk info in c-ares

Provide more information in `ares_txt_reply` to coalesce chunks from the
same record into one string.

fix #7367
http: add request.flush() method

Forcibly flushes the request headers.  You need this with long-lived
HTTP connections where the first data isn't written until the connection
has been established (think: tunneling requests over HTTP CONNECT.)

Fixes #7296.

Signed-off-by: Fedor Indutny <fedor@indutny.com>
doc: fix order in net api

Signed-off-by: Fedor Indutny <fedor@indutny.com>
doc: fix missing link in net api

Signed-off-by: Fedor Indutny <fedor@indutny.com>
deps: make v8 use CLOCK_REALTIME_COARSE

Date.now() indirectly calls gettimeofday() on Linux and that's a system
call that is extremely expensive on virtualized systems when the host
operating system has to emulate access to the hardware clock.

Case in point: output from `perf record -c 10000 -e cycles:u -g -i`
for a benchmark/http_simple bytes/8 benchmark with a light load of
50 concurrent clients:

    53.69%     node  node                 [.] v8::internal::OS::TimeCurrentMillis()
               |
               --- v8::internal::OS::TimeCurrentMillis()
                  |
                  |--99.77%-- v8::internal::Runtime_DateCurrentTime(v8::internal::Arguments, v8::internal::Isolate*)
                  |          0x23587880618e

That's right - over half of user time spent inside the V8 function that
calls gettimeofday().

Notably, nearly all system time gets attributed to acpi_pm_read(), the
kernel function that reads the ACPI power management timer:

    32.49%     node  [kernel.kallsyms]    [k] acpi_pm_read
               |
               --- acpi_pm_read
                  |
                  |--98.40%-- __getnstimeofday
                  |          getnstimeofday
                  |          |
                  |          |--71.61%-- do_gettimeofday
                  |          |          sys_gettimeofday
                  |          |          system_call_fastpath
                  |          |          0x7fffbbaf6dbc
                  |          |          |
                  |          |          |--98.72%-- v8::internal::OS::TimeCurrentMillis()

The cost of the gettimeofday() system call is normally measured in
nanoseconds but we were seeing 100 us averages and spikes >= 1000 us.
The numbers were so bad, my initial hunch was that the node process was
continuously getting rescheduled inside the system call...

v8::internal::OS::TimeCurrentMillis()'s most frequent caller is
v8::internal::Runtime_DateCurrentTime(), the V8 run-time function
that's behind Date.now().  The timeout handling logic in lib/http.js
and lib/net.js calls into lib/timers.js and that module will happily
call Date.now() hundreds or even thousands of times per second.
If you saw exports._unrefActive() show up in --prof output a lot,
now you know why.

That's why this commit makes V8 switch over to clock_gettime() on Linux.
In particular, it checks if CLOCK_REALTIME_COARSE is available and has
a resolution <= 1 ms because in that case the clock_gettime() call can
be fully serviced from the vDSO.

It speeds up the aforementioned benchmark by about 100% on the affected
systems and should go a long way toward addressing the latency issues
that StrongLoop customers have been reporting.

This patch will be upstreamed as a CR against V8 3.26.  I'm sending it
as a pull request for v0.10 first because that's what our users are
running and because the delta between 3.26 and 3.14 is too big to
reasonably back-port the patch.  I'll open a pull request for the
master branch once the CR lands upstream.

Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Signed-off-by: Fedor Indutny <fedor@indutny.com>