`man xinetd.conf' says nearly `only_from' (paragraph d):
d) a host name. When a connection is made to xinetd, a reverse
lookup is performed, and the canonical name returned is com-
pared to the specified host name. You may also use domain
names in the form of .domain.com. If the reverse lookup of
the client's IP is within .domain.com, a match occurs.
When running an own named (nameserver is 127.0.0.1) use of e.g
| only_from = host.local.zone
results in a parsing error during startup.
This happens because xinetd starts at position 50, but named laterly at pos
55. So DNS lookups done by xinetd will fail.
Hmmm.... will fix