Reuse http_network library.

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

library/server/httpd/ssl/httpd_server.e

@@ -19,7 +19,7 @@ create
 
 feature {NONE} -- Factory
 
-	new_listening_socket (a_addr: detachable INET_ADDRESS; a_http_port: INTEGER): HTTP_STREAM_SOCKET
+	new_listening_socket (a_addr: detachable INET_ADDRESS; a_http_port: INTEGER): HTTPD_STREAM_SOCKET
 		local
 			s_ssl: HTTPD_STREAM_SSL_SOCKET
 		do
@@ -31,11 +31,27 @@ feature {NONE} -- Factory
 					create s_ssl.make_server_by_port (a_http_port)
 				end
 				s_ssl.set_tls_protocol (configuration.ssl_protocol)
-				s_ssl.set_certificate_filenames (configuration.ca_crt, configuration.ca_key)
+				if attached configuration.ca_crt as l_crt then
+					s_ssl.set_certificate_file_name (l_crt)
+				end
+				if attached configuration.ca_key as l_key then
+					s_ssl.set_key_file_name (l_key)
+				end
+
 				Result := s_ssl
 			else
 				Result := Precursor (a_addr, a_http_port)
 			end
 		end
 
+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