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

Reused the http_network library as well inside httpd library.

library/server/httpd/configuration/httpd_constants.e

@@ -0,0 +1,28 @@
+note
+	description: "[
+			Various constant values used in httpd settings.
+		]"
+	author: "$Author$"
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	HTTPD_CONSTANTS
+
+feature -- Default connection settings
+
+	default_http_server_port: INTEGER = 80
+	default_max_concurrent_connections: INTEGER = 100
+	default_max_tcp_clients: INTEGER = 100
+
+feature -- Default timeout settings
+
+	default_socket_timeout: INTEGER = 60 -- seconds
+	default_socket_recv_timeout: INTEGER = 5 -- seconds
+
+feature -- Default persistent connection settings
+
+	default_keep_alive_timeout: INTEGER = 15 -- seconds
+	default_max_keep_alive_requests: INTEGER = 100
+
+end