yahns-rackup.pod in yahns-1.12.4

- old
+ new

@@ -157,9 +157,19 @@
 
 The RACK_ENV variable is set by the aforementioned -E switch.
 If RACK_ENV is already set, it will be used unless -E is used.
 See rackup documentation for more details.
 
+=head1 CAVEATS
+
+yahns is strict about buggy, non-compliant Rack applications.
+Some existing servers work fine without "Content-Length" or
+"Transfer-Encoding: chunked" response headers enforced by Rack::Lint.
+Forgetting these headers with yahns causes clients to stall as they
+assume more data is coming.  Loading the Rack::ContentLength and/or
+Rack::Chunked middlewares will set the necessary response headers
+and fix your app.
+
 =head1 CONTACT
 
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