Complete support for rc.conf.d

- gendepends.sh needs to read this directory to allow dependencies to be
  overridden
  - init.sh for Linux and Bsd need to read it to allow config settings
    they use to be overridden.

sh/init.sh.Linux.in

@@ -5,6 +5,11 @@
 
 . "$RC_LIBEXECDIR"/sh/functions.sh
 [ -r "@SYSCONFDIR@/rc.conf" ] && . "@SYSCONFDIR@/rc.conf"
+if [ -d "@SYSCONFDIR@/rc.conf.d" ]; then
+	for _f in "@SYSCONFDIR@"/rc.conf.d/*.conf; do
+		[ -e "$_f" ] && . "$_f"
+	done
+fi
 
 # By default VServer already has /proc mounted, but OpenVZ does not!
 # However, some of our users have an old proc image in /proc