Do not strictly depend on rsyslog package

debian/control

@@ -9,7 +9,8 @@ Standards-Version: 3.9.6
 
 Package: rsyslog-exporter
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}, rsyslog
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Recommends: rsyslog
 Built-Using: ${misc:Built-Using}
 Description: Rsyslog Prometheus exporter.
  Exports rsyslogd metrics to Prometheus.