Update WiFiClient.cpp (#4573)

Replace (depricated) bzero, bcopy with memset and memcpy.

libraries/WiFi/src/WiFiClient.cpp

@@ -216,9 +216,9 @@ int WiFiClient::connect(IPAddress ip, uint16_t port, int32_t timeout)
 
     uint32_t ip_addr = ip;
     struct sockaddr_in serveraddr;
-    bzero((char *) &serveraddr, sizeof(serveraddr));
+    memset((char *) &serveraddr, 0, sizeof(serveraddr));
     serveraddr.sin_family = AF_INET;
-    bcopy((const void *)(&ip_addr), (void *)&serveraddr.sin_addr.s_addr, 4);
+    memcpy((void *)&serveraddr.sin_addr.s_addr, (const void *)(&ip_addr), 4);
     serveraddr.sin_port = htons(port);
     fd_set fdset;
     struct timeval tv;