Description of Problem:

at boot-up /etc/rc.d/rc.sysinit starts up the raiddevices from 
/etc/raidtab (if this file exists) and falls back to a raid-repair-shell 
if it can't find/load the devices. This is behaviour is correct and 
should be like that, but I use personally sometimes a raid-array on a 
external scsi-storage, which I don't want to use every time. So if I  
leave my /etc/raidtab the boot-up stops everytime with a repair-shell if 
I haven't enabled the external storage and I need to remove or rename 
/etc/raidtab and reboot the machine.

Instead rc.sysinit should verify in /etc/fstab if this raid-device should 
really be loaded at bootup (via the "noauto" flag in /etc/fstab) and 
_only_ if "noauto" is _not_ given on the fstab-line start the 
raid-services on this device.

The attached patch does this and skips initialization of raid-devices, 
which have the "noauto" flag set in /etc/fstab.

Please apply.