udev-rules: optionally install /etc/udev/udev.conf

udevd runs even without this config file

modules.d/95udev-rules/module-setup.sh

@@ -7,8 +7,9 @@ install() {
     # Fixme: would be nice if we didn't have to guess, which rules to grab....
     # ultimately, /lib/initramfs/rules.d or somesuch which includes links/copies
     # of the rules we want so that we just copy those in would be best
-    inst_multiple udevadm cat uname blkid \
-        /etc/udev/udev.conf
+    inst_multiple udevadm cat uname blkid
+    inst_dir /etc/udev
+    inst_multiple -o /etc/udev/udev.conf
 
     [ -d ${initdir}/$systemdutildir ] || mkdir -p ${initdir}/$systemdutildir
     for _i in ${systemdutildir}/systemd-udevd ${udevdir}/udevd /sbin/udevd; do