Update seafile to 7.0.9
- Check if block exists when downloading
- Add sync error when failing to parse head commit
- Add --with-python3 option and remove python2
- Remove dependency python-future
- Support breakpad
- Remove redundant error notification
- Ignore apple double files (._*)
Removed patch that was no longer needed. Configure with --with-python3.
Drop rundep on python-future.
Test Plan: Installed seafile and seafile-client. Synced some libraries without issues.
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Differential Revision: https://dev.getsol.us/D9325