Resolving is retried in increasing intervals (maximum is one hour)
until it succeeds or fails with a non-temporary error.
Unresolved sources are included in the activity report as offline
sources and the online command can be used to retry it immediately.
This could be improved by resolving in a separate thread/process
to avoid blocking.
Instead of retrying to resolve it in the function and blocking for a
long time, return a TryAgain status and let the caller retry it later if
necessary.
This is a verbatim copy of the files at that stage of the repository that was
built from the CVS import. It allows future development to see a bit of recent
history, but without carrying around the baggage going back to 1997. If that
is really required, git grafts can be used.
