gdb/remote - I/O

[Andrew Cagney]

Just an additional datapoint on this.

The qRcmd packet (my fault) and the tracepoint packets (I've been
reading C code) both use the existing ``O'' packet to send additional
output back from the target during a query.

The obvious question is where exactly that ``O'' packet is ment to be
going - gdb_stdtarg, gdb_stdlog or gdb_stdout.  If it is gdb_stdout and
there is a pager things can get really complicated.

	Andrew