In short you can update ,"/usr/ports" & "/usr/src" by 4 ways: http(web), ftp, subversion(svn), git.
Shouldn't handbook explain each way, and this in quarterly and non-quarterly, main version release candidate, and not refer to an appendix.
Shouldn't handbook explain each way, and this in quarterly and non-quarterly, main version release candidate, and not refer to an appendix.