Parse rc.local.d directory on boot

Fixes QubesOS/qubes-issues#8690

Author: ben-grande

init/setup-rw.sh

@@ -31,7 +31,10 @@ if mountpoint -q /rw ; then
 # This script will be executed at every VM startup, you can place your own
 # custom commands here. This includes overriding some configuration in /etc,
 # starting services etc.
-
+#
+# Executable scripts located in /rw/config/rc.local.d are executed
+# immediately before this rc.local.
+#
 # Example for overriding the whole CUPS configuration:
 #  rm -rf /etc/cups
 #  ln -s /rw/config/cups /etc/cups
@@ -49,7 +52,7 @@ EOF
 #
 # It is a good place for custom rules and actions that should occur when the
 # firewall service is started.
-# 
+#
 # Executable scripts located in /rw/config/qubes-firewall.d are executed
 # immediately before this qubes-firewall-user-script.
 EOF

vm-systemd/misc-post.sh

@@ -11,6 +11,8 @@ if [ -n "$(ls -A /usr/local/lib 2>/dev/null)" ] || \
     ldconfig
 fi
 
-if [ -x /rw/config/rc.local ] ; then
-    /rw/config/rc.local
-fi
+for init_script in /rw/config/rc.local.d/* /rw/config/rc.local; do
+    [ -f "${init_script}" ] || continue
+    [ -x "${init_script}" ] || continue
+    "${init_script}"
+done