Logging non-500 exceptions

[Arek Gil]

Currently Plug.Cowboy.Translator only logs exceptions that were raised in the Plug pipeline only if the Plug.Exception.status/1 for the error returns a status code greater than or equal to 500:

plug_cowboy/lib/plug/cowboy/translator.ex

Lines 31 to 33 in 8aa34d8

 if non_500_exception?(reason) do 
   :skip 
 else 

Would you be open for making this behaviour configurable? My thinking is that while implementing Plug.Exception is a great way to customize status codes (and in case of Phoenix, rendered responses), it's not always desirable to swallow the exception completely.

[José Valim]

We can make it customizable, yes. Probably need to use the app environment, PRs are welcome!