<copyright>
<prgn/userv/ is
-Copyright 1996-2017 Ian Jackson;
+Copyright 1996-2021 Ian Jackson;
+Copyright 2021 Genome Research Limited apropos work by Matthew Vernon;
Copyright 2000 Ben Harris;
Copyright 2016-2017 Peter Benie.
<p>
<p>
<var/service-user/ specifies which user is to provide the service.
-The user may be a login name or a numeric uid, or <tt/-/ to indicate
+The user must be a login name, or <tt/-/ to indicate
that the service user is to be the same as the calling user.
<p>