fix bug 1073163 - use WSGI in default configs
Merge pull request #2404 from rhelmer/bug1073163-use-wsgi-for-apps

fix bug 1073163 - use WSGI in default configs
fixes bug 1072286 - 500 errors on 404s from the crash_data middleware, r=@rhelmer
Merge pull request #2399 from peterbe/bug-1072286-500-errors-on-404s-from-the-crash_data-middleware

fixes bug 1072286 - 500 errors on 404s from the crash_data middleware