GitLab

also added a couple commas or missing spaces

 Replaced underscores with hypens in D2 config in remaining files:

    doc/examples/ddns/sample1.json
    doc/examples/ddns/template.json
    doc/guide/ddns.xml
    src/bin/d2/tests/d2_process_tests.sh.in
    src/bin/keactrl/kea.conf.pre
    src/bin/keactrl/tests/keactrl_tests.sh.in

Descriptions of the two parameters, ncr-protocol and ncr-format
were swapped in three places (but hey, we were consistent!):

    doc/guide/ddns.xml
    doc/guide/dhcp4-srv.xml
    doc/guide/dhcp6-srv.xml

    Added discussion of PID files to start up section for
    each of the servers.

Update per the review comments with the execptions
of two that are discussed - mostly the D2 vs DHCP-DDNS debate.

 - Daemon::getVersion() added
 - exists => exits in docs
 - fixed comment in dhcp_test_lib.sh.in

discussed little on jabber.
I opened a new ticket to fix code to at #3514

Including: ensuring consistent formaat for lists, ensuring
order of items in a list explaining an example JSON map
corresponds to the order of the elements in the map, etc.