process: document kill(0), disallow kill(O_RDWR)

The null signal test existed, but only tested the case where the target
process existed, not when it did not exist.

Also clarified that SIGUSR1 is reserved by Node.js only for receiveing,
its not at all reserved when sending a signal with kill().

kill(pid, 'O_RDWR'), or any other node constant, "worked". I fixed this
by also checking for 'SIG'. The same as done in the isSignal() function.
Now the signal names supported by process.kill() are the same as those
supported by process.on().
doc: change constant to consistent
doc: list execArgv option for child_process.fork()
tls: fix pool usage race

When calling `encOut` in loop, `maybeInitFinished()` may invoke
`clearOut`'s loop, leading to the writing of interleaved data
(encrypted and cleartext) into the one shared pool.

Move `maybeInitFinished()` out of the loop and add assertion for
future.
blog: bnoordhuis departure
crypto: Make Decipher._flush() emit errors.

When Decipher processes a stream using an incorrect key, the
DecipherFinal() method throws an unhandled exception at the end of the
stream.
lib: child_process spawn handle ENOENT correctly

child_process spawn wasn't handlig ENOENT correctly on Windows.
This is half a fix for test-child-process-cwd.js.
The other half is going into libuv.
build: add libicu i18n support

Adds a --with-icu-path= switch to the configure script.  Requires that
the user checks out the copy of libicu that's bundled with chromium to
a fixed directory.  It's still a little rough around the edges but it
works.

Fixes #6371.
tls: fix handling of asterisk in SNI context

Wildcard server names should not match subdomains.

Quote from RFC2818:

   ...Names may contain the wildcard
   character * which is considered to match any single domain name
   component or component fragment. E.g., *.a.com matches foo.a.com but
   not bar.foo.a.com. f*.com matches foo.com but not bar.com.

fix #6610
openssl: add assembly for aes and gcm
doc: document 'error' event for stream.Writable

fix #5255
doc: mention execArgv in setupMaster
benchmark: fixate `ciphers` in tls benchmarks

Benchmark should always use the same cipher in order to be truthful.
tls_wrap: use writev when possible

Try writing multiple chunks from NodeBIO if possible.
crypto: fix moving read head

Fix various possible stalls of read head (i.e. try moving it after every
write head update).

NOTE: This is actually backported from `bud`.
child_process: don't crash process on internal ops

1. Swallow errors when sending internal NODE_HANDLE_ACK messages, so
   they don't crash the process.
2. Queue process.disconnect() if there are any pending queued messages.

Fixes test-child-process-fork-net2.js on win.
http: DELETE shouldn't default to chunked encoding
build: Ignore gyp-generated files on android

The android generator for gyp currently doesn't support
--generator-output - this makes embedding node.js as project dependency
difficult for android projects.

Note: the generated files in deps/uv should be ignored in libuv's
.gitignore
build: ./configure pass positional args to gyp

use `--` to specify the arguments you want to pass directly to gyp.

for example: `./configure -- --no-parallel -Dsome_define=foo`

fixes #6370
build: pass --no-parallel by default to gyp

gyp by default now tries to process gyp files in parallel by using
python's multiprocessing module, but it has problems on oddball
platforms. We don't have many files or complex dependency chains that
would benefit from parallel processing so disable by deafult

fixes #6640