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2015-11-18reduce constant lookup dependencies
Unicorn 5 removes some constants we were using, and constant lookups + inline caching are waste of time anyways on newer Rubies with the opt_str_freeze bytecode instruction. This may reduce performance for folks on older Rubies (probably not noticeable); but improves performance for folks on newer Rubies.
2011-01-07more consistent use/avoidance of HeaderHash
Rack::Utils::HeaderHash is still expensive, so avoid forcing it on users since we can assume app/library authors use normally-cased HTTP headers.
2010-06-10add Rainbows::ServerToken middleware
Some folks can now show off their Rainbows! installation