Moved httpd library from ewsgi/connectors/standalone/lib/httpd to httpd.

Reused the http_network library as well inside httpd library.

library/server/httpd/httpd_controller.e

@@ -0,0 +1,28 @@
+note
+	description: "[
+			Object used to control (i.e shutdown) the server.
+			Mostly needed in SCOOP concurrency mode.
+		]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	HTTPD_CONTROLLER
+
+feature -- Operation
+
+	shutdown
+			-- Request the associated server to be shutdown.
+		do
+			shutdown_requested := True
+		end
+
+feature -- Status report.		
+
+	shutdown_requested: BOOLEAN
+			-- Shutdown requested.
+
+;note
+	copyright: "2011-2013, Javier Velilla, Jocelyn Fiat and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end