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_logger_constants.e

@@ -0,0 +1,22 @@
+note
+	description: "[
+			Constant value to define the logging level.
+		]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	HTTPD_LOGGER_CONSTANTS
+
+feature -- Access
+
+	alert_level: INTEGER 		= 1		-- 0000 0001
+	critical_level: INTEGER 	= 2		-- 0000 0010
+	error_level: INTEGER 		= 4		-- 0000 0100
+	warning_level: INTEGER 		= 8		-- 0000 1000
+
+	notice_level: INTEGER 		= 16	-- 0001 0000
+	information_level: INTEGER 	= 32	-- 0010 0000
+	debug_level: INTEGER 		= 64	-- 0100 0000	
+
+end