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

soak

@@ -115,11 +115,11 @@ do
     _log "    *** pass $pass (`date`)"
     
     _log "        *** check"
-    _check_fs $SCRATCH_DEV
+    _check_scratch_fs
     
     _log "        *** mounting scratch device"
 
-    if ! mount -t xfs $SCRATCH_DEV $SCRATCH_MNT 2>&1 | _logp
+    if ! _scratch_mount 2>&1 | _logp
     then
         _fail "            !!! failed to mount"
     fi
@@ -131,7 +131,7 @@ do
                         || _fail "            !!! couldn't delete old dir"
 
         _log "        *** check"
-        _check_fs $SCRATCH_DEV
+        _check_scratch_fs
     fi
 
     _log "        *** mkdir"