#7 Make sid-filter parse a configuration file "sid-filter.cf"

[Fredrik Pettai]

I would be nice to have sid-filter parse a configuration
file as a default (for example /etc/mail/sid-filter.cf )
and but make the command-line parameters override the
cf-file options.

In this way you wouldn't have to specify a long
command-line if you have for example multiple
peers/domains. (It would be in one file only, instead
of both command-line options + peer-file)

The syntax for the cf file could be taken from the
current man page.