Simplified proxy example, no more proxy.conf file.

Added forwarding case based on server name.

examples/proxy/README.md

@@ -2,5 +2,17 @@ Proxy example
 =============
 
 Via the `wsf_proxy` library, it is possible to implement a simple reverse proxy service. 
-Note: you need to edit the `proxy.conf` file to use proper remote service.
-(You can use for instance any of the EWF examples as remote server, or also existing public server).
+
+This example forwards request based on server name, or location as described below:
+- if server name is `foo`, forwards to `http://localhost:8080/foo`
+- if server name is `bar`, forwards to `http://localhost:8080/bar`
+- if path starts with "/search/", forwards to `http://www.google.com/search?q=`
+
+For instance:
+- http://foo/a/test -> http://localhost:8080/foo/a/test
+- http://localhost:9090/search/eiffel -> http://www.google.com/search?q=eiffel
+
+Notes:
+- look at `{APPLICATION_EXECUTION}.execute` for the implementation.
+- the `send_proxy_response` implements a general forwarding, but for more advanced need, this could be customized per forwarding. For instance, a specific forwarding, may need the X-Forwarded headers, or to keep the `Host` from the client, ...
+