idled select timeout: configurable?

[Ian G Batten]

Having cause to strace a copy of idled, I see it's timing out the select
in its main loop every second.  So far as I can see from the source,
it's doing this to check for the shutdown file coming into existence.
For those of use that just shut cyrus down with kill out of an rc
script, would it be worth providing a configuration option to reduce the
load of a process waking up every second?  Would the maintainers accept
a patch to do this?

ian