The /etc/dhcp/dhclient.d/chrony.sh script creates files with NTP servers
from DHCP only if the PEERNTP variable is not set to "no" (e.g. in
/etc/sysconfig/network). If the variable was set after the files were
already created, the chronyd service would still use the NTP servers
until the files were removed (e.g. after network restart).
Modify the chrony-helper script to check the variable before loading
any servers from dhclient files. Setting the variable and restarting
the chronyd service should now have an immediate effect.
