First part of the ability to resume partial transfers. Resuming a partly
transfered new file works. Still need to cope with partial librsync transfers.
More work on resuming partial transfers.
A bit more work on resuming partial files.
More partial resume stuff.
More partial resume work.
More work on partial resume.
More partial resume progress.
Partial resume very nearly working.
Partial resume now appears to be working. Needs more testing.
Improvements to partial resume.
Improvements to partial resume.
Merge branch 'resume_partial'