There are a number of commands specific to process record,
as opposed to reverse debugging, which we don't have tests
for yet.  For instance,

  set/show insn-number-max
  set/show stop-at-limit
  info record
  record delete
  record stop

Plus, there is the behavior of the execution log that should
be tested under various combinations of those settings.

Here is an attempt that I've started on.  I'd appreciate any
suggestions, especially with respect to other tests that you
think should be added.  The more things we test, the more
corner cases we can find and fix.  (there are a couple of
failures already in there due to corner cases and spellings).

And Hui -- I'd be delighted if you would take over the
ownership of this test!   ;-)

Michael