[DRE-maint] Bug#1100010: Info received (schleuder: API daemon fails: undefined method `register' for module Rack::Handler (NoMethodError))

[Gabriel Filion]

For what it's worth I found this which seems to point towards our bug 
being 'thin' not yet supporting rack 3:

https://github.com/macournoyer/thin/issues/389

maybe we should reassign this to thin? (I'm not doing it now since I'm 
not yet 100% confident on my analysis)