Do not omit zero-unread items in TTRSS getCounter operation
Though TTRSS itself (usually) omits items that have a counter of zero, at least one client takes this to mean the last-seen counter is unchanged, rather than zero.
@ -140,6 +140,7 @@ We are not aware of any other extensions to the TTRSS protocol. If you know of a
- Article hashes are normally SHA1; The Arsse uses SHA256 hashes
- Article attachments normally have unique IDs; The Arsse always gives attachments an ID of `"0"`
- The default sort order of the `getHeadlines` operation normally uses custom sorting for "special" feeds; The Arsse's default sort order is equivalent to `feed_dates` for all feeds
- The `getCounters` operation normally omits members with zero unread; The Arsse includes everything to appease some clients