Mention PSFTP on title page

[originally from svn r4678]

doc/blurb.but

@@ -14,10 +14,10 @@ page</a>.</p>}
 
 \preamble PuTTY is a free (MIT-licensed) Win32 Telnet and SSH
 client. This manual documents PuTTY, and its companion utilities
-PSCP, Plink, Pageant and PuTTYgen.
+PSCP, PSFTP, Plink, Pageant and PuTTYgen.
 
 \copyright This manual is copyright 2001-2004 Simon Tatham. All
 rights reserved. You may distribute this documentation under the MIT
 licence. See \k{licence} for the licence text in full.
 
-\versionid $Id: blurb.but,v 1.11 2004/08/10 17:12:31 simon Exp $
+\versionid $Id: blurb.but,v 1.12 2004/10/24 15:41:44 jacob Exp $