re #3765 and #5432
fixes #4743

uv_async_t handles for dispatching of debug messages and
emitting NODE_DEBUG_ENABLED used to be initialized every time
node::EnableDebug() was called, which happened every time
user sends a SIGUSR1.

Now they are initialized only once from node::Init() during
application start.

Implement support for debugging cluster workers. Each worker process
is assigned a new debug port in an increasing sequence.

I.e. when master process uses port 5858, then worker 1 uses port 5859,
worker 2 uses port 5860, and so on.

Introduce new command-line parameter '--debug-port=' which sets debug_port
but does not start debugger. This option works for all node processes, it
is not specific to cluster workers.

Fixes joyent/node#5318.

WriteBuffer was changed in the cork/uncork implementation (60ed2c54).
The unused argument has been removed.

Preserve default install prefix seen in process.config, but use DESTDIR
for installing to deliniate 32/64 versions, avoid conflicts with PREFIX
settings in config.mk

Change vcbuild.bat to ignore VCINSTALLDIR environment variable,
always check for specific VS version and set GYP_MSVS_VERSION
accordingly. Otherwise GYP generates project files in format
that cannot be compiled by VS2012.

Add a regression test for commit f8d81222.

setMaxListeners was the only EventEmitter method that returned
undefined, so could not be chained.

When developer calls setBreakpoint with an unknown script name,
we convert the script name into regular expression matching all
paths ending with given name (name can be a relative path too).

To create such breakpoint in V8, we use type `scriptRegEx`
instead of `scriptId` for `setbreakpoint` request.

To restore such breakpoint, we save the original script name
send by the user. We use this original name to set (restore)
breakpoint in the new child process.

This is a back-port of commit 5db936d2 from the master branch.

After much investigation it turns out that the affected servers are
buggy.  user-service.condenastdigital.com:443 in particular seems to
reject large TLS handshake records. Cutting down the number of
advertised ciphers or disabling SNI fixes the issue.

Similarly, passing { secureOptions: constants.SSL_OP_NO_TLSv1_2 }
seems to fix most connection issues with IIS servers.

Having to work around buggy servers is annoying for our users but not
a reason to downgrade OpenSSL. Therefore, revert it.

This reverts commit 4fdb8acd.

1. The stability index must come first, or it messes up the markdown
2. require.extensions is an Object, not an Array.

Close #5387

Like commit d258fb02 ("http: More useful setTimeout API on server") but
this time for the https module.

Fixes #5361.

Add a watchdog class which executes a timer in a separate event loop in
a separate thread that will terminate v8 execution if it expires.

Add timeout argument to functions in vm module which use the watchdog
if a non-zero timeout is specified.

test.py imports deps/v8/tools/utils.py but that file is gone after the
upgrade to 3.18.4 in commit 2f75785c. Resurrect the file in tools/

Fix a bug in setBreakpoint() where not all regex characters are escaped
when constructing scriptRegEx for V8.

This commit undoes the downgrade from OpenSSL v1.0.1e to v1.0.0f,
effectively upgrading OpenSSL to v1.0.1e again. The reason for the
downgrade was to work around compatibility issues with certain TLS
servers in the stable branch. See the commit log of 4fdb8acd and the
linked issue for details. We're going to revisit that in the master
branch.

This reverts commit 4fdb8acd.

Forward-port the comments from commit 01e29202 (v0.10) to the master
branch. Everything else from that patch already exists in master.

It didn't merge cleanly because lib/http.js has been split up in
several files.

Conflicts:
	AUTHORS
	ChangeLog
	deps/uv/ChangeLog
	deps/uv/src/version.c
	lib/http.js
	src/node_crypto.cc
	src/node_os.cc
	src/node_version.h
	test/simple/helper-debugger-repl.js

Several people have reported issues with IIS and Resin servers (or maybe
SSL terminators sitting in front of those servers) that are fixed by
downgrading OpenSSL. The AESNI performance improvements were nice but
stability is more important. Downgrade OpenSSL from 1.0.1e to 1.0.0f.

Fixes #5360 (and others).

Fixes #5379.

Add Writev method to StreamWrap class for writing mixed array of strings
and buffers. Expose this method for TCP class.

When developer calls setBreakpoint with an unknown script name,
we convert the script name into regular expression matching all
paths ending with given name (name can be a relative path too).

To create such breakpoint in V8, we use type `scriptRegEx`
instead of `scriptId` for `setbreakpoint` request.

To restore such breakpoint, we save the original script name
send by the user. We use this original name to set (restore)
breakpoint in the new child process.

Fixed a bug in debugger repl where `restart` command did not work
when a custom debug port was specified via command-line option
--port={number}.

File test/simple/helper-debugger-repl.js was extracted
from test/simple/test-debugger-repl.js

To improve troubleshooting of debugger problems in the future,
the debugger repl now prints the port it is connecting to.