Rename libuuid user to uuidd in libuuidd1 postinst as well

Just in case the user doesn't have uuid-runtime installed
duplicate the postinst part converting the user to
make sure everyone gets converted over.

This should be dropped once it has shipped in a stable release.

debian/libuuid1.postinst

+#!/bin/sh
+set -e
+
+##########################################################################
+# This is a partial copy of uuid-runtime.postinst just to make sure      #
+# everyone gets their user renamed (even if they don't have uuid-runtime #
+# installed).  This package used to create the user in the first place,  #
+# but no longer uses it and all handling has been moved to uuid-runtime. #
+# This (entire file?) should be dropped after this code has shipped in a #
+# Debian Stable release (so we know everyone has been migrated).         #
+##########################################################################
+
+# upgrade existing libuuid user/group.
+if getent group libuuid >/dev/null && ! getent group uuidd >/dev/null ; then
+	groupmod --new-name uuidd libuuid
+fi
+if getent passwd libuuid >/dev/null && ! getent passwd uuidd >/dev/null ; then
+	# switch existing libuuid user to not have a login shell.
+	if [ "$(getent passwd libuuid | cut -d: -f7)" = "/bin/sh" ]; then
+		chsh -s /bin/false libuuid
+	fi
+
+	# rename user and set new homedir.
+	usermod --login uuidd --home /run/uuidd libuuid
+
+	# attemp cleanup of old home directory.
+	[ -d /var/lib/libuuid ] && \
+		rmdir --ignore-fail-on-non-empty /var/lib/libuuid
+fi
+
+#DEBHELPER#