Adding write(str) and write(buf, size) methods to Print class and Ethernet library Client and Server classes. This allows sending a whole string or buffer at once, reducing the number of ethernet packets.

hardware/libraries/Ethernet/Client.cpp

@@ -2,6 +2,7 @@ extern "C" {
   #include "types.h"
   #include "w5100.h"
   #include "socket.h"
+  #include "string.h"
 }
 
 #include "Ethernet.h"
@@ -50,6 +51,14 @@ void Client::write(uint8_t b) {
   send(_sock, &b, 1);
 }
 
+void Client::write(const char *str) {
+  send(_sock, (const uint8_t *)str, strlen(str));
+}
+
+void Client::write(const uint8_t *buf, size_t size) {
+  send(_sock, buf, size);
+}
+
 int Client::available() {
   return getSn_RX_RSR(_sock);
 }