don't exclude the /git/ and /pub/ directories

add vcs directories to rsync exclude patterns

Huge November 2023 update This update implements most of the changes I've been thinking about for the last half-a-year: - I wish to serve files over many protocols: http, gopher, ftp, rsync and finger, and maybe even things like gemini in future. - I wish to maintain a history of changes as a git repository. - Maintaining the above, I don't want to do more things manually than necessary. - Maintaining a sensible news feed is something I've been struggling with since beginning -- I wish to minimise that. - I've written a lot of things here while angry at the entire world. I am a much calmer person now, and wish my former frustrations gone.