Drop the chrony-helper script in favor of the new sourcedir directive.
Modify the dhclient script to save NTP servers from DHCP to
/run/chrony-dhcp/$interface.sources and configure chronyd to (re)load
the sources from files in that directory on start and the "reload
sources" command.
Other functionality of the helper script is dropped with no
replacemement.
- replace initstepslew directive with makestep in default config
- add NetworkManager dispatcher script
- add dhclient script
- retry server/peer name resolution at least once to workaround
NetworkManager race condition on boot
- don't verify chrony.keys
