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

[Tuomo Soini]

New commits:
commit b9291179dfedbb95662d4dfba8402bb68419a08b
Author: Tuomo Soini <tis at foobar.fi>
Date:   Fri Jul 16 23:23:27 2021 +0300

    config.mk: give better error for USE_KLIPS
    
    Note: On purpose give error for USE_KLIPS=false too