Numerous changes to QA scripts allowing tests to run with external log/rt devices; also allow multiple mkfs/mount options at once now.

009

@@ -66,7 +66,7 @@ _block_filter()
 _init()
 {
     echo "*** mkfs"
-    if ! mkfs_xfs $SCRATCH_DEV >$tmp.out 2>&1
+    if ! _scratch_mkfs_xfs >$tmp.out 2>&1
     then
 	cat $tmp.out
         echo "failed to mkfs $SCRATCH_DEV"
@@ -74,7 +74,7 @@ _init()
     fi
 
     echo "*** mount"
-    if ! mount $SCRATCH_DEV $SCRATCH_MNT -t xfs
+    if ! _scratch_mount
     then
         echo "failed to mount $SCRATCH_DEV"
         exit 1