kgio provides non-blocking I/O methods for Ruby without raising
exceptions on EAGAIN and EINPROGRESS. It is intended for use with the
Unicorn and Rainbows! Rack servers, but may be used by other
applications.

* http://bogomips.org/kgio/
* kgio@librelist.org />* git://bogomips.org/kgio.git

Changes:

== All supported platforms (*nix + MRI 1.8+, Rubinius)

* OpenBSD (and possibly other *BSD) fixes, thanks to Jeremy Evans.

* kgio_accept and kgio_tryaccept now take an optional second argument
for flags (like the accept4() flags argument).

== Ruby 1.9-only things

* Kgio.poll no longer raises Errno::EINTR to match IO.select.

== Ruby 1.9 trunk things

* close() on an active FD in a different thread is better
handled/detected.

* copy-on-write for strings is properly triggered