jtblin/html_mini — pull request #1 by leandroadacosta (2013-08-07 19:18:57+00:00)
Title: Change headers['Html-Mini'] to headers['X-Html-Mini']

The normal approach is to start their name with X-. E.g. X-Forwarded-For or X-Requested-With. This is also mentioned in section 5 of RFC 2047.