Online dpANS CL - addendum

[Kent M Pitman <KMP@STONY-BROOK.SCRC.Symbolics.COM>]

Just when you think you've got everything carefully arranged, one last detail comes up...

Xerox apparently wants you to know that PARCFTP.Xerox.COM is the preferred name
for obtaining the sources.  Currently, PARCFTP.Xerox.COM points to Beta.Xerox.COM,
so there's no difference, but Xerox might want to change the physical host which does
their public FTP service at some point, and if they do the name PARCFTP.Xerox.COM
will point to the new host.  So please prefer to use (and advertise) that name.

Sorry for any confusion my use of the less abstract name might have caused.