Reuse http_network library.

Reintroduced HTTPD_STREAM_SOCKET for backward compatibility, and ease of usage.
Added websocket libraries (client, and protocol).

library/server/httpd/network/httpd_stream_socket.e

@@ -0,0 +1,32 @@
+note
+	description: "[
+			Socket for HTTPD networking.
+		]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	HTTPD_STREAM_SOCKET
+
+inherit
+	HTTP_STREAM_SOCKET
+
+create
+	make, make_empty,
+	make_client_by_port, make_client_by_address_and_port,
+	make_server_by_port, make_server_by_address_and_port, make_loopback_server_by_port
+
+create {NETWORK_STREAM_SOCKET}
+	make_from_descriptor_and_address
+
+note
+	copyright: "2011-2016, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end