definition; from Michael Forney

the log destination changes. ok claudio@ benno@

an (auto) settime or give up. 15s timeout is still in effect. ok florian@

ok benno@

If the time is wrong, we cannot validate dnssec, leading to failed
DNS lookups, so we cannot adjust or set the time.  Work around this
by repeating a failed DNS lookup with a lookup with the DC (check
disabled) bit set. ok florian@

it, remove some verbose shutdown messages that we had before with pipe
close.
ok reyk@

ok reyk@, bcook@

part of the original ISC license that we use in OpenBSD.  Done for
files were Henning is the original author.
OK henning@ deraadt@

OK bcook@ jung@

/dev/null.  copy the code from the ntp engine.

types of functions (perhaps required by 'stdio' or 'libevent' will not
become available unless DNS suceeds.  Replace it with "stdio dns".

that's the case after kernel code got fixed to handle inet6 for dns...

ignore it directly. no functional change. Rafael Neves rafaelneves at gmail

allows to get constraint addresses even if network/DNS is not
available at startup (or system boot).
thumbs up & OK henning@

If the network is unreachable when ntpd starts and host_dns fails, be sure
that we still close the HOST_DNS imsg.
Thanks to Paul de Weerd <weerd at weirdnet dot nl> for reporting this.
ok beck@

- Nothing seems to free the result of host_dns(), so add host_dns_free() and
call after each query.
- If imsg_add() fails, it frees buf. Avoid subsequently dereferencing the
freed buf in imsg_close().
ok millert@ deraadt@

peanuts -- but all work has to start somewhere.

dns process at normal priority.  Should improve latency on loaded machines.
ok henning@

ok krw

ibuf, buf_read to ibuf_read, READ_BUF_SIZE to IBUF_READ_SIZE.
ok henning gilles claudio jacekm deraadt

reason: the parent process must never ever block, but the dns routines can.
last not least this fixes ntpd -s 'hanging' for a long time.
tested by a couple of people