Added creation of varnish user and group to postinst

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1867 d4fa192b-c00b-0410-8231-f00ffab90ce4

debian/varnish.postinst

+# Automatically added by dh_installinit
+if [ -x "/etc/init.d/varnish" ]; then
+	update-rc.d varnish defaults >/dev/null
+	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
+		invoke-rc.d varnish start || exit $?
+	else
+		/etc/init.d/varnish start || exit $?
+	fi
+fi
+# End automatically added section
+# Automatically added by dh_installinit
+if [ -x "/etc/init.d/varnishlog" ]; then
+	update-rc.d varnishlog defaults >/dev/null
+	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
+		invoke-rc.d varnishlog start || exit $?
+	else
+		/etc/init.d/varnishlog start || exit $?
+	fi
+fi
+# End automatically added section
+
+varnish_setup_user() {
+        if ! id varnish > /dev/null 2>&1 ; then
+                adduser --system --no-create-home varnish 2>&1 > /dev/null || exit 78
+        fi
+}
+
+