syncthing/syncthing — pull request #789 by AudriusButkevicius (2014-10-05 00:06:51+00:00)
Title: Renames should be handled efficiently (fixes #3)

Attempt one.

Alternative version would be to check just for the files we are removing, which would get rid of the `WithHave`.

Ideally I'd like this global block cache thing come true, and have even better stuff happen automagically in `handleFile`.