When I install umtp-responder I get a warning in my systemd journal:
Jan 19 16:45:28 systemd[1]: /lib/systemd/system/umtp-responder.service:4: Invalid URL, ignoring: /usr/share/doc/umtp-responder/README.Debian
It looks like the Documentation field is the line being complained about:
$ sed -n 4p /lib/systemd/system/umtp-responder.service
Documentation=/usr/share/doc/umtp-responder/README.Debian
According to the systemd.unit manual page, Documentation is for URLs:
$ man systemd.unit | grep -A2 Documentation
Documentation=
A space-separated list of URIs referencing documentation for this unit or its configuration. Accepted are
only URIs of the types "http://", "https://", "file:", "info:", "man:". For more information about the
So I think this should silence the warning:
Documentation=file:///usr/share/doc/umtp-responder/README.Debian