init: sysvinit+NM support

The issue at hand it _nmconnect group that's supported
in ALT NM for polkit-less cases; it has to be added
*before* 50-users hook from deflogin feature fires off.

The existing systemd-related hook has been renamed
to reflect its job better.

features.in/init/rootfs/image-scripts.d/40-sysvinit

@@ -0,0 +1,10 @@
+#!/bin/sh
+# 40: should run before 50-users in deflogin
+
+# the part below relates to sysvinit specifically
+rpm -q sysvinit || exit 0
+
+# NM-specific group
+case "$GLOBAL_GROUPS" in
+	*_nmconnect*) groupadd -r _nmconnect ||:;;
+esac