Provide a way to disable Lint and StackTrace middleware in development

[siracusa]

I'd like a way to disable the automatic inclusion of the the Lint and StackTrace middleware when the PLACK_ENV is "development." In a complex app, producing the the stack trace can take a long time (sometimes over a minute). If the problem is just a simple syntax error, this is frustrating. I'd like to have the option to disable this middleware while still using the convention that PLACK_ENV is set to "development" when we're in development.

[miyagawa]

I'll consider adding this as an option, since it comes up often in the irc channel as a confusion. for now you can use whatever string (like develop) to stop plackup doing this.

[siracusa]

Yes, that's another part of it: I went through that same confusion myself, not understanding why I seemingly couldn't disable the StackTrace middleware (since it gets added if PLACK_ENV is "development" or if its not set to a true value).

[miyagawa]

FWIW, that behavior is documented in perldoc plackup - if it's not clear i would accept patches to improve.