Rainbows! is an HTTP server for sleepy Rack applications. It is based on
Unicorn, but designed to handle applications that expect long
request/response times and/or slow clients.

* http://rainbows.rubyforge.org/
* rainbows-talk@rubyforge.org />* git://git.bogomips.org/rainbows.git

Changes:

There is one incompatible change: We no longer assume application
authors are crazy and use strangely-cased headers for "Content-Length",
"Transfer-Encoding", and "Range". This allows us to avoid the
case-insensitivity of Rack::Utils::HeaderHash for a speed boost on the
few apps that already serve thousands of requests/second per-worker.

:Coolio got "async.callback" support like :EventMachine, but it
currently lacks EM::Deferrables which would allow us to call
"succeed"/"fail" callbacks. This means only one-shot response writes
are supported.

There are numerous internal code cleanups and several bugfixes for
handling partial static file responses.