Debian: Update lighttpd files to handle www relocate

The previous submission to relocate www to var/www here:
https://review.opendev.org/c/starlingx/config-files/+/809454

was partially updated for the .conf file, but these two
files were omitted.  They have now been updated.

The dev/null under the lighttpd chroot (jail) also
needs to be initialized.  'mknod' is used to create that
/var/www/dev/null so that the same special character file
and same permissions are used like the regular /dev/null.

Test Plan:
  Build / Bootstrap / Unlock / Reboot on Debian AIO-SX

Depends-On: https://review.opendev.org/c/starlingx/utilities/+/842917
Story: 2009969
Task: 45364
Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: Iefce2149042ef121c069af4964826bc685fc2957

lighttpd-config/source-debian/lighttpd.init

@@ -54,11 +54,15 @@ start()
     done
 
     echo -n "Mounting scratch filesystem to chroot tmp..."
-    umount /www/tmp >& /dev/null
+    umount /var/www/tmp >& /dev/null
     rm -r /scratch/lighttpd >& /dev/null
     mkdir -p /scratch/lighttpd
-    mount --bind /scratch/lighttpd /www/tmp/
-    chown www /www/tmp/
+    mount --bind /scratch/lighttpd /var/www/tmp/
+    chown www /var/www/tmp/
+
+    echo -n "Initialize chroot dev/null for $DESC..."
+    mkdir -p /var/www/dev
+    mknod -m 666 /var/www/dev/null c 1 3
 
     echo -n "Starting $DESC..."
 
@@ -86,7 +90,7 @@ stop()
     fi
     rm -f $PIDFILE
     echo -n "Unmounting scratch filesystem from chroot tmp..."
-    umount /www/tmp
+    umount /var/www/tmp
 }
 
 status()

lighttpd-config/source-debian/lighttpd.logrotate

@@ -1,7 +1,7 @@
 /var/log/lighttpd-access.log
 /var/log/lighttpd-error.log
-/www/var/log/lighttpd-access.log
-/www/var/log/lighttpd-error.log {
+/var/www/var/log/lighttpd-access.log
+/var/www/var/log/lighttpd-error.log {
         nodateext
         size 10M
         start 1