Initial import of NetBSD rc system

IMPORTANT: this change has a docs/UPDATING entry!

This patch performs an initial import of the infrastructure and a
subset of the NetBSD set of rc startup and shutdown scripts.  The
"initial" refers to the fact that this is not yet a full switch to the
NetBSD rc system: the MINIX ramdisk rc script, which (typically) runs
as the first thing, is kept as is.  After mounting the root file
system, the ramdisk rc script will start the NetBSD rc infrastructure
by invoking /etc/rc, however.  The regular MINIX startup-and-shutdown
script has been moved from /etc/rc to /etc/rc.minix, and is now
invoked as part of the NetBSD rc infrastructure through a bridge rc
script /etc/rc.d/minixrc.  /etc/rc.minix invokes /usr/etc/rc as before.

Switching over the ramdisk to the NetBSD system and decomposing the
MINIX rc.minix script into smaller components are left to future work.
Also, the current pkgsrc etc/rc.d auto-start functionality is left as
is, even though it should be removed (see the etc/usr/rc comment).

Change-Id: Ia96cae7c426e94b85c67978dc1307dacc4b09fc5

etc/usr/rc

@@ -25,13 +25,10 @@ fi
 bootcd="`/bin/sysenv bootcd`"
 
 case "$#:$1" in
-1:autoboot)
-    action=start
-    ;;
-1:start|1:stop|1:down)
+1:start|1:stop)
     action=$1
     ;;
-*)  echo >&2 "Usage: $0 autoboot|start|stop|down"
+*)  echo >&2 "Usage: $0 [start|stop]"
     exit 1
 esac
 
@@ -161,7 +158,7 @@ capemgr() {
 DAEMONS=/etc/rc.daemons
 
 case $action in
-start|autoboot)
+start)
     # Select console font.
     test -f /etc/font && loadfont /etc/font </dev/console
 
@@ -236,9 +233,7 @@ start|autoboot)
 		ln -s /tmp/log /var/log || true
 		. /etc/rc.cd
     fi
-    # syslogd has not been started yet
-    rm -f /var/run/syslogd.pid
-    daemonize syslogd -s
+
     echo .
 
     # i2c only supported on ARM at the moment
@@ -393,23 +388,6 @@ start|autoboot)
 	fi
     fi
 
-    # Now that all device files should be created, see if we need to update the
-    # device file database.  This code is butchered from NetBSD etc/rc.d/sysdb.
-    DEVDIR=/dev
-    DEVDB=/var/run/dev.cdb
-    if [ ! -f "$DEVDB" -o "$DEVDIR" -nt "$DEVDB" ]
-    then
-	dev_mkdb
-    fi
-
-    # Same for /etc/services.
-    SERVICESFILE=/etc/services
-    SERVICESDB=/var/db/services.cdb
-    if [ ! -f "$SERVICESDB" -o "$SERVICESFILE" -nt "$SERVICESDB" ]
-    then
-	services_mkdb -q
-    fi
-
     if [ "$net" ]
     then
 	# Get the nodename from the DNS and set it.
@@ -427,7 +405,7 @@ start|autoboot)
     # Run the daily cleanup on systems that are not on at night.
     test -f /usr/etc/daily && sh /usr/etc/daily boot &
 ;;
-stop|down)
+stop)
     	# Save random data, if /usr is mounted rw.
 	if grep ' \/usr .*rw.*' /etc/mtab >/dev/null
 	then
@@ -440,8 +418,10 @@ stop|down)
 	fi
 esac
 
-d=
 # Let packages run their own scripts
+# FIXME: this should be removed altogether: pkgsrc is not supposed to be used
+# this way.  Instead, the user should copy over scripts from /usr/pkg/etc/rc.d
+# to /etc/rc.d as desired, and configure them in /etc/rc.conf as appropriate.
 for d in /usr/local/etc/rc.d /usr/pkg/etc/rc.d
 do
 if [ -d "$d" -a -z "$bootcd" ]