Add in --exact
Add in --exact

Provide a way to use an earlier entry as a template for a new entry
but use the template entry exactly.  This is mostly intended for
testing.  It can also be used to put an entry back into a timeline if
it was accidentally removed.

Signed-off-by: Michael Hendricks <17b9e1c64588c7fa6419b4d29dc1f4426279ba01@ndrix.org>

mndrix/clk