bsd-family-tree: Update various URLs in file

Been some time since 364fe18b8c8 when the URL was first in this file.
Update from svnweb to cgit for the URL listed at the end of this file.
In addition, update all URLs to HTTPS. Replace two URLs with links to
archive.org as the original URLs are no longer valid.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D34730