[Swan-commit] Changes to ref refs/heads/main

[Tuomo Soini]

New commits:
commit 89fed4552657024d26a48ad67adae2c11099ae31
Author: Tuomo Soini <tis at foobar.fi>
Date:   Fri Jul 16 23:01:19 2021 +0300

    config.mk: Error out on deprecated since 4.0 config variables