[Crash-utility] "gdb" by itself ought to put crash into a "gdb" mode

[Bruce Korb]

Hi,

I might actually write the patch for this one.  Piping back to crash,
as useful as it would be,
requires too much context shuffling.  Here, all that'd be necessary is
a "we are in pass
through to gdb" mode meaning that the "gdb " prefix to gdb commands
would not be necessary.
Just monitor the input for a "crash" line and flip the bit.  It's a
nuisance to have to remember
that prefix when typing a long series of gdb commands that mostly work
as crash commands.

Possible?  Thanks !  Regards, Bruce