Disabling all ignore lists

[shravan2x]

I have a large codebase project synced via Seafile with 1M+ files. It so happens that in one part of this codebase, we store persistent data in a DB called "thumbs.db". I was looking into why the program behaved differently after syncing to a different machine when I found that Seafile ignores some files by default with no way to disable it. The relevant code is at https://github.com/haiwen/seafile/blob/master/daemon/repo-mgr.c#L1180.

Could an option be added to sync all-files under a folder as-is? I'm happy to manually ignore any files I don't want via seafile-ignore.txt.