fix: ClientSecure.available() fix for connection closed by remote socket

Author: JAndrassy

Diff for: libraries/NetworkClientSecure/src/NetworkClientSecure.cpp

@@ -305,9 +305,11 @@ int NetworkClientSecure::available() {
   res = data_to_read(sslclient.get());
 
   if (res < 0 && !_stillinPlainStart) {
-    log_e("Closing connection on failed available check");
+    if (res != MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
+      log_e("Closing connection on failed available check");
+    }
     stop();
-    return peeked ? peeked : res;
+    return peeked;
   }
   return res + peeked;
 }

Diff for: libraries/NetworkClientSecure/src/ssl_client.cpp

@@ -27,7 +27,7 @@
 const char *pers = "esp32-tls";
 
 static int _handle_error(int err, const char *function, int line) {
-  if (err == -30848) {
+  if (err == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
     return err;
   }
 #ifdef MBEDTLS_ERROR_C