Ethernet W5100/ENC gateway compile (not verified).

Remove SPI/ENC/W5100 from embedded libraies.

libraries/UIPEthernet/tests/perl/udpserver.pl

@@ -1,40 +0,0 @@
-#!/usr/bin/perl
-#udpserver.pl
-
-use IO::Socket::INET;
-
-# flush after every write
-$| = 1;
-
-my ($socket,$received_data);
-my ($peeraddress,$peerport);
-
-#  we call IO::Socket::INET->new() to create the UDP Socket and bound
-# to specific port number mentioned in LocalPort and there is no need to provide
-# LocalAddr explicitly as in TCPServer.
-$socket = new IO::Socket::INET (
-LocalPort => '5000',
-Proto => 'udp',
-) or die "ERROR in Socket Creation : $!\n";
-
-while(1)
-{
-# read operation on the socket
-$socket->recv($recieved_data,1024);
-
-#get the peerhost and peerport at which the recent data received.
-$peer_address = $socket->peerhost();
-$peer_port = $socket->peerport();
-print "($peer_address , $peer_port) said : $recieved_data\n";
-
-#send the data to the client at which the read/write operations done recently.
-$data = "data from server\n";
-
-$socket->send($data);
-
-print $socket "$data";
-
-}
-
-$socket->close();
-