wdavidw/node-http-status — pull request #13 by jamsesso (2014-06-27 20:29:04+00:00)
Title: Add support for HTTP status 422.

Adds support for the Unprocessable Entity HTTP status code - useful when the content type was understood and the syntax was properly formed, but the server was unable to process the instructions.
Coming from a bit of a rails background, I find this status code used quite often.

http://restpatterns.org/HTTP_Status_Codes/422_-_Unprocessable_Entity