DOC: mention namespaces
DOC: mention trailing dot rules
DOC: mention RFC 2317 (classless del.)
DOC: ipv6 ::1.2.3.4 not supported
DOC: verbatim text

Update the utilities

convert slashes in domain names when creating file names!

freebsd: don't use `-f' in hostname
domain names with dots

? if a zone doesn't change, don't bump the version