[PATCH] job-specifier: Add next-week configuration method.

[Dale Mellor]

Re: 
>>  * src/mcron/job-specifier.scm (next-week): New procedure.
>>  * tests/job-specifier.scm (next-week): New test.

   This new procedure by default gets the time of seven days after
today's coming midnight: not what I would expect to be the start of
"next week".

   If a list is provided to the method, the elements of this list are
interpreted as the number of seven day periods since the start of the
current month: also not, IMHO, a very useful thing to have (the effect
can easily be got with (next-day '(...)), which would be more
explicit).

   Thus, I am not going to apply this patch (see other messages which
will appear here in due course explaining how I am going to resolve
this issue).

Thanks for your interest in this, and, apologies for the delay in me
addressing this issue,

Dale