unix: port getaddrinfo to new thread pool

unix: add custom thread pool

include: make ngx_queue macros sanitary

linux: please valgrind, free memory at exit

Free the memory that is used to store the new argv and envp. It's not strictly
necessary (the OS is going to reclaim the memory anyway) but it

linux: please valgrind, free memory at exit

Free the memory that is used to store the new argv and envp. It's not strictly
necessary (the OS is going to reclaim the memory anyway) but it makes the output
from valgrind a lot less noisy.

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test: fix memory leak in tcp_ping_pong

test: delete default loop after test run

Delete the default event loop after the test completes. Keeps valgrind happy.

test: add valgrind support

Run tests through valgrind when UV_USE_VALGRIND=1 is set in the environment.

test: fix error message in runner

test: add uv_fs_readlink test

doc: add lxjs talk to readme

unix: move getaddrinfo code to getaddrinfo.c

unix: close async pipe fds on loop delete

include: remove uv_counters_t, missed in 837edf4

windows: fix vcbuild.bat issue

gyp_uv was complaining because it never receives a value for which type
of library to build (static vs shared). This makes vcbuild.bat set the
default

windows: fix vcbuild.bat issue

gyp_uv was complaining because it never receives a value for which type
of library to build (static vs shared). This makes vcbuild.bat set the
default to build a static library.

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windows: don't blow up when an invalid FD is used

unix: map EDQUOT to UV_ENOSPC

windows: build system improvements

* Add shared/static library option
* Add x86/x64 target option
* Improve Visual Studio detection
* Set GYP_MSVS_VERSION to pick VS2010 over VS2

windows: build system improvements

* Add shared/static library option
* Add x86/x64 target option
* Improve Visual Studio detection
* Set GYP_MSVS_VERSION to pick VS2010 over VS2008

Closes GH-504
Closes GH-514

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Add mailing list to readme

Rearrange struct layouts to make FFI bindings easier

This patch ensures that all struct fields are in this order:
1. public
2. readonly
3. private

darwin: fsevents: emit UV_CHANGE on metadata change

unix: map EDQUOT to UV_ENOSPC

darwin: fix 'directive in macro' compiler warning

darwin: emit relative path in fsevents

unix: rethink relaxed accept() approach

Benchmarks demonstrated that the idle timer handle approach didn't balance the
load quite fair enough, the majority of new connections still ended

unix: rethink relaxed accept() approach

Benchmarks demonstrated that the idle timer handle approach didn't balance the
load quite fair enough, the majority of new connections still ended up in one
or two processes.

The new approach voluntarily gives up a scheduler timeslice by calling
nanosleep() with a one nanosecond timeout.

Why not sched_yield()? Because on Linux (and this is probably true for other
Unices as well), sched_yield() only yields if there are other processes running
on the same CPU.

nanosleep() on the other hand always forces the process to sleep, which gives
other processes a chance to accept our pending connections.

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test: fix aliasing warning in dns-server.c