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

Reused the http_network library as well inside httpd library.

library/server/httpd/concurrency/none/httpd_request_handler.e

@@ -0,0 +1,32 @@
+note
+	description : "Concurrent specific feature to implement HTTPD_REQUEST_HANDLER"
+	date        : "$Date$"
+	revision    : "$Revision$"
+
+deferred class
+	HTTPD_REQUEST_HANDLER
+
+inherit
+	HTTPD_REQUEST_HANDLER_I
+		redefine
+			is_persistent_connection_supported
+		end
+
+feature -- Status report	
+
+	is_persistent_connection_supported: BOOLEAN = False
+			-- <Precursor>
+			-- When there is no concurrency support, do not try to support
+			-- persistent connection!	
+
+note
+	copyright: "2011-2015, 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