=doc port over some http documentation from the scala side

akka-docs-dev/rst/java/http/configuration.rst

@@ -0,0 +1,28 @@
+.. _akka-http-configuration-java:
+
+Configuration
+=============
+
+Just like any other Akka module Akka HTTP is configured via `Typesafe Config`_.
+Usually this means that you provide an ``application.conf`` which contains all the application-specific settings that
+differ from the default ones provided by the reference configuration files from the individual Akka modules.
+
+These are the relevant default configuration values for the Akka HTTP modules.
+
+akka-http-core
+~~~~~~~~~~~~~~
+
+.. literalinclude:: ../../../../akka-http-core/src/main/resources/reference.conf
+   :language: none
+
+
+akka-http
+~~~~~~~~~
+
+.. literalinclude:: ../../../../akka-http/src/main/resources/reference.conf
+   :language: none
+
+
+The other Akka HTTP modules do not offer any configuration via `Typesafe Config`_.
+
+.. _Typesafe Config: https://github.com/typesafehub/config