'disks/required' w/ freespace= behavior

[Jeff Blaine]

Solaris 2.7
cfengine 1.6.2

Firstly, the reference manual states that 'disks' is a synonym for
'required'.  Using 'disks' as a directive/action fails with a parse
error.  Replacing the words 'disks' with 'required' causes my
script to work fine.  What's going on there?

Now onto the real problem (am I doing something wrong?).  You'll see
below that /var has 1593316 K free.  My rule states 19500 MB to be
free.  cfengine reports that all is super.

==============================================================================
# df -k /var
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/c0t0d0s3    2066707  370056 1593316    19%    /var
==============================================================================
# cfengine -dd -f test.cfe
...
Filesystem /var looks sensible
[/var is on a different file system, not descending]
Free space above 19968000, defining
...
==============================================================================
# cat test.cfe
control:

    actionsequence = (
        required
    )

required:
    myhost::
        /var freespace=19500mb