Change some error messages to debug.
-rw-r--r-- 29 AUTHORS
-rw-r--r-- 2806 CMakeLists.txt
-rw-r--r-- 11435 LICENSE
-rw-r--r-- 1558 README
drwxr-xr-x - build
drwxr-xr-x - packaging
drwxr-xr-x - src
drwxr-xr-x - systemd
drwxr-xr-x - tests