Merge branch 'bugfix/esp_tls_memory_leak' into 'master'

esp-tls: fix memory leak when using CA certification validation

See merge request idf/esp-idf!2283

components/esp-tls/esp_tls.c

@@ -136,7 +136,7 @@ static void mbedtls_cleanup(esp_tls_t *tls)
     if (!tls) {
         return;
     }
-    
+    mbedtls_x509_crt_free(&tls->cacert);
     mbedtls_entropy_free(&tls->entropy);
     mbedtls_ssl_config_free(&tls->conf);
     mbedtls_ctr_drbg_free(&tls->ctr_drbg);