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

Reused the http_network library as well inside httpd library.

library/server/httpd/network/httpd_stream_socket_ext.e

@@ -0,0 +1,13 @@
+note
+	description: "[
+			Extension to HTTPD_STREAM_SOCKET to support backward compatibility.
+			
+			TO BE REMOVED IN THE FUTURE, WHEN 16.05 IS OLD.
+		]"
+
+deferred class
+	HTTPD_STREAM_SOCKET_EXT
+
+feature {NONE} -- No-Exception network operation
+
+end