[Groff] Moving the footer up in ms

[Timothy Groves]

Is there a way to move the footer up within the footer margin when using 
ms?  By default, groff+ms places the footer halfway down the footer 
margin, which is not what I want, but any attempt to move it up by 
inserting a .sp -x in .BT either results in an error [ fatal error: 
input stack limit exceeded (probable infinite loop) ]  or else produces 
a smear of footers.  This leads me to think that the .sp order is 
causing the footer macro to re-issue.  Any suggestions?