An informal list of FIXMEs which don't warrant full tickets...

This is not *intended* to be a list of long-lived fixme's, but more of a scratchpad for things which come up spontaneously and shouldn't be forgotten.

- When using `f-parseparty --crosslink` across the whole repo, we sometimes end up with checkins being marked as leaves which are definitely not leaves (e.g. one of them an old version of the trunk branch). Correcting this simply requires running `fossil rebuild`. The source of the problem is not yet clear, but the main culprit is the checkin crosslink process.
- When using `f-parseparty --crosslink` across the whole repo, we sometimes end up with checkins being marked as leaves which are definitely not leaves (e.g. one of them an old version of the trunk branch). Correcting this simply requires running `fossil rebuild`. The source of the problem is not yet clear, but the main culprit is the checkin crosslink process. Edit: the checkin crosslinking is definitely the culprit, as can be seen by deleting all entries from the `mlink` and `plink` tables and running `f-parseparty -t c -c` to (ostensibly) rebuild them.