[gambit-list] Expose debugging primitives?

[Bradley Lucier]

Marc:

The following functions that implement debugging primitives would be 
very useful in exception handlers:

_repl.scm:(define-prim (##cmd-? port)
_repl.scm:(define-prim (##cmd-b depth cont port)
_repl.scm:(define-prim (##cmd-y depth cont pinpoint? port)
_repl.scm:(define-prim (##cmd-e cont port)
_repl.scm:(define-prim (##cmd-i cont port)

Perhaps versions of these these should be made available officially.

Brad