docs/http/README.md in flipper-0.11.0.beta4 vs docs/http/README.md in flipper-0.11.0.beta5

@@ -30,5 +30,6 @@
 * headers: HTTP headers.
 * basic_auth_username:  Basic Auth username.
 * basic_auth_password: Basic Auth password.
 * read_timeout: [number in seconds](https://docs.ruby-lang.org/en/2.3.0/Net/HTTP.html#attribute-i-read_timeout).
 * open_timeout: [number in seconds](https://docs.ruby-lang.org/en/2.3.0/Net/HTTP.html#attribute-i-open_timeout).
+* debug_output: Set an output stream for debugging (e.g. `debug_output: $stderr`). The output stream is passed on to [Net::HTTP#set_debug_output](https://ruby-doc.org/stdlib-2.4.1/libdoc/net/http/rdoc/Net/HTTP.html#method-i-set_debug_output).