Log Message:
www/ruby-rack-contrib: update to 2.2.0

Update to ruby-rack-contrib to 2.2.0.

2.2.0 (2020-03-31)

A healthy crop of fixes and new features in this release. Thanks to
everyone who contributed, and welcome to Andrew Konchin, as the newest
recipient of a commit bit.

* New middleware Rack::JSONBodyParser: a better-designed replacement for
  Rack::PostBodyContentTypeParser, with a more appropriate name (given that
  they both only handle JSON natively, having JSON in the name seems like a
  good idea), and with a better set of default behaviours and knobs.  It is
  also significantly faster than PostBodyContentTypeParser.

* Rack::PostBodyContentTypeParser: this middleware's interface is a bit of a
  mess, which makes it nearly impossible to improve in a
  backwards-compatible manner. As a result, its use has been deprecated, in
  favour of Rack::JSONBodyParser.

* Several middlewares that set Content-Length headers were fixed to use
  String#bytesize, instead of String#size, which makes multibyte characters
  much happier. (Chris Frank)

* Rack::ResponseCache: Make header detection case-insensitive. (Chris Frank)

* A lot of broken tests and deprecation warnings in the test suite were
  fixed. (Andrew Konchin)

* Rack::Locale: significant correctness fixes, including q=0 handling, case
  insensitivity where appropriate, and better handling of whitespace.
  (Andrew Konchin)

* Rack::StaticCache: several correctness fixes, such as setting a Date
  response header, use UTC in timestamps, and improving the robustness of
  the date rendering.

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