This changes the prototype of uv_run() from:
int uv_run(uv_loop_t* loop);
To:
int uv_run(uv_loop_t* loop, uv_run_mode mode);
Where `mode` is UV_RUN_DEFAULT, UV_RUN_ONCE or UV_RUN_NOWAIT.
Fixes#683.
Replace `void f()` with `void f(void)`; the former means "a function
that takes any number of arguments, including none" while the latter
is what is actually intended: a function taking no arguments.
The first form also isn't strictly conforming ANSI/ISO C.
This changes uv-win to use the new uv_req subclasses.
It gets rid of the uv_req.flags field. There used to be only request flag
(UV_REQ_PENDING), and it was mostly obsolete; it only had a real purpose for
internal uv_read requests. Now we'll use the UV_HANDLE_READ_PENDING flag on
the handle instead.
This patch also simplifies the accept logic for named pipes on windows. We
no longer have a separate struct to store information about established
connections. Instead we just carry over the windows HANDLE from the accept
request to the client handle in uv_pipe_accept().
