Added "--re='split-pattern'" option. The value should be a regular expression with groups, in which case lines are matched against it (via regexp.FindSubmatch) and match and groups are returned as output fields.
Added "--re='split-pattern'" option. The value should be a regular expression with groups, in which case lines are matched against it (via regexp.FindSubmatch) and match and groups are returned as output fields.

raff/glin