build with git-2.34.1
    
    Apply the patches Christian Hesse has regularly posted upstream to track
    the current git release.  Just because it's bundled doesn't mean it
    should fall so far behind.
    
    While here, update the comment regarding bundled git provides.  It is
    neither safe nor fair to assume that the security team are the folks
    interested in tracking the bundled git, nor that they are all guys. :)