Replaced printf with sim_printf.
More General cleanup migrate to using sim_printf vs separate calls to printf and fprintf(sim_log).
SCP: Fix NOEXPECT to actually delete a single indicated expect rule.  Allow expect actions to be provided.  Fix match buffer management when expect regular expressions are in use.
SCP: Fix help text for expect command.
SCP: Fix SEND <dev>:line when after=nn and delay=nn not specified

For a command like:  SEND MUX:0 "abc"
in which a device is specified but there are no after=nn and delay=nn parameters, the code neglected to update cptr, resulting in an illegal argument error condition.