The "/timeline.rss" page:
Produce an RSS feed of the timeline.
TYPE may be: all, ci (show check-ins only), t (show tickets only),
w (show wiki only).
LIMIT is the number of items to show.
tkt=UUID filters for only those events for the specified ticket. tag=TAG
filters for a tag, and wiki=NAME for a wiki page. Only one may be used.
In addition, name=FILENAME filters for a specific file. This may be
combined with one of the other filters (useful for looking at a specific