This is a modified version of the Korn Shell debugger from Bill
Rosenblatt's `Learning the Korn Shell', published by O'Reilly
and Associates (ISBN 1-56592-054-6).

The original `kshdb' is available for anonymous FTP with the URL

ftp://ftp.uu.net/published/oreilly/nutshell/ksh/ksh.tar.Z

