Add a note that config.py must remain compatible with Python 3.4
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/scripts/config.py b/scripts/config.py
index 91e37ad..c106a97 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -7,6 +7,9 @@
if 'MBEDTLS_RSA_C' in config: print('RSA is enabled')
"""
+# Note that the version of this script in the mbedtls-2.28 branch must remain
+# compatible with Python 3.4.
+
## Copyright The Mbed TLS Contributors
## SPDX-License-Identifier: Apache-2.0
##