PR-URL: #9164
Reviewed-by: Colin Ihrig <cjihrig@gmail.com>

Timeout#unref() call returns undefined, not this. The test already
worked before, because the interval was still unref'd, and the test also
succeeds without clearing the interval.

PR-URL: #9171
Reviewed-by: Colin Ihrig <cjihrig@gmail.com>
Reviewed-by: Timothy J Fontaine <tjfontaine@gmail.com>

Change the fs.F_OK/R_OK/W_OK/X_OK out of fs.js will lead unexpect
exception. Make these properties readonly.

PR-URL: #9060
[trev.norris@gmail.com test properties are read only]
Signed-off-by: Trevor Norris <trev.norris@gmail.com>

The -fno-strict-aliasing flag was added to fix compilation warnings when
building Node.js with GCC <= 4.4

process.send() should be synchronous, it should block until the message
has been sent in full, but it wasn't after the second-to-last libuv
upgrade because of commit libuv/libuv@393c1c5 ("unix: set non-block
mode in uv_{pipe,tcp,udp}_open"), which made its way into io.js in
commit 07bd05b ("deps: update libuv to 1.2.1").

Commit libuv/libuv@b36d4ff ("unix: implement uv_stream_set_blocking()")
as landed in io.js in commit 9681fca ("deps: update libuv to 1.4.0")
makes it possible to restore the synchronous behavior again and that's
precisely what this commit does.

The same line of reasoning applies to `net.Socket({ fd: 1 })`: creating
a socket object from a stdio file descriptor, like the `process.stdout`
getter does, should put the file descriptor in blocking mode for
compatibility reasons.

PR-URL: nodejs/node#774
Reviewed-by: Trevor Norris <trev.norris@gmail.com>