Add sysusers.d config file to allow rpm to create users/groups automatically

See https://fedoraproject.org/wiki/Changes/RPMSuportForSystemdSysusers.

util-linux.spec

@@ -274,7 +274,6 @@ See also the "uuid-devel" package, which is a separate implementation.
 Summary: Helper daemon to guarantee uniqueness of time-based UUIDs
 Requires: libuuid = %{version}-%{release}
 License: GPL-2.0-only
-Requires(pre): shadow-utils
 %{?systemd_ordering}
 
 %description -n uuidd
@@ -314,6 +313,11 @@ The utilities scripts, scriptreplay, and scriptlive are used to create and repla
 %prep
 %autosetup -p1 -n %{name}-%{upstream_version}
 
+# Create a sysusers.d config file
+cat >util-linux.sysusers.conf <<EOF
+u uuidd - 'UUID generator helper daemon' /var/lib/libuuid -
+EOF
+
 %build
 unset LINGUAS || :
 
@@ -467,6 +471,8 @@ find  %{buildroot}%{_mandir}/man8 -regextype posix-egrep  \
 mv -v %{buildroot}/usr/sbin/* %{buildroot}/usr/bin/
 %endif
 
+install -m0644 -D util-linux.sysusers.conf %{buildroot}%{_sysusersdir}/util-linux.conf
+
 %post
 %systemd_post fstrim.{service,timer}
 
@@ -478,12 +484,6 @@ mv -v %{buildroot}/usr/sbin/* %{buildroot}/usr/bin/
 %systemd_postun fstrim.service
 
 %pre -n uuidd
-getent group uuidd >/dev/null || groupadd -r uuidd
-getent passwd uuidd >/dev/null || \
-useradd -r -g uuidd -d /var/lib/libuuid -s /sbin/nologin \
-    -c "UUID generator helper daemon" uuidd
-exit 0
-
 # Please, keep uuidd running after installation! Note that systemd_post is
 # "systemctl preset" and it enable/disable service only.
 %post -n uuidd
@@ -899,6 +899,7 @@ fi
 %{compldir}/uuidd
 %{_tmpfilesdir}/uuidd-tmpfiles.conf
 %{_sysusersdir}/uuidd.conf
+%{_sysusersdir}/util-linux.conf
 
 
 %files -n libfdisk