Explicitly set the configuration file and logging mode

contrib/systemd/acmed.service

@@ -1,6 +1,7 @@
 [Unit]
 Description=ACME client daemon
 After=network.target
+ConditionPathExists=/etc/acmed/acmed.toml
 Documentation=man:acmed.toml(5) man:acmed(8) https://github.com/breard-r/acmed/wiki
 
 [Service]
@@ -12,8 +13,7 @@ WorkingDirectory=/var/lib/acmed
 RuntimeDirectory=acmed
 
 # daemon handling: start, stop, timeouts
-#ExecStart=/usr/bin/acmed --foreground --pid-file /run/acmed/acmed.pid --log-level trace --log-stderr
-ExecStart=/usr/bin/acmed --foreground --pid-file /run/acmed/acmed.pid --log-level info
+ExecStart=/usr/bin/acmed --foreground --config /etc/acmed/acmed.toml --pid-file /run/acmed/acmed.pid --log-syslog --log-level info
 TimeoutStartSec=3
 TimeoutStopSec=5
 Restart=on-failure