Remove the ability of dns_forward_zones to configure ip listening/allowed ranges

Update documentation to reflect this change.

Change restart behavior to run `systemctl daemon-reload` to adapt to
possible reconfiguration of unit file.

Bug fix in config file - had listen instead of access-control in one
section.

Change-Id: I0aa01a1ad5cd06f79e5c4fda68367e1416c6bd9d
5 files changed