Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
  When releasing an oci8 connection always set the resource to null.

Author: cjbj

ext/oci8/oci8.c

@@ -2351,7 +2351,6 @@ int php_oci_connection_release(php_oci_connection *connection)
 		connection->svc = NULL;
 		connection->server = NULL;
 		connection->session = NULL;
-		connection->id = NULL;
 
 		connection->is_attached = connection->is_open = connection->rb_on_disconnect = connection->used_this_request = 0;
 		connection->is_stub = 1;
@@ -2368,6 +2367,9 @@ int php_oci_connection_release(php_oci_connection *connection)
 #endif /* HAVE_OCI8_DTRACE */
 	}
 
+	/* Always set id to null, so next time a new resource is being registered. */
+	connection->id = NULL;
+
 	OCI_G(in_call) = in_call_save;
 	return result;
 }