Update EthernetServer.h

I edited the line:
EthernetServer(uint16_t);
in
EthernetServer();
and I added;
virtual void begin(uint16_t);
So user can choose in his sketch to use "server.begin();" without parameters and the library will use tcp port 80 as default, or user can use "server.begin(int);" and the webserver will start using the tcp port indicated in the sketch (for example the tcp port can be stored in eprom. At board's startup, it can read the value and use it, while before user must declare a fixed tcp port).

Author: 5a2v0

libraries/Ethernet/src/EthernetServer.h

@@ -11,8 +11,9 @@ public Server {
   uint16_t _port;
   void accept();
 public:
-  EthernetServer(uint16_t);
+  EthernetServer();
   EthernetClient available();
+  virtual void begin(uint16_t);
   virtual void begin();
   virtual size_t write(uint8_t);
   virtual size_t write(const uint8_t *buf, size_t size);