Use encoding/csv to write the log file so that it complies with RFC 4180.
Use encoding/csv to write the log file so that it complies with RFC 4180.

andybalholm/redwood,yinheli/redwood-filter,unixabg/redwood,yinheli/redwood-filter,vishnuvaradaraj/redwood,andybalholm/redwood,yinheli/redwood-filter,unixabg/redwood,vishnuvaradaraj/redwood,vishnuvaradaraj/redwood