GitLab

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

versus splitting sentence with example in  middle.
This is just my style preference.

While doing this fix the explanation for enabling mysql and postgres
as previously it appeared to imply that you had to specify
the path to the config script (but first example didn't follow what
was stated).

and remove comment about "drafts" since none here

fix one grammar plural mistake

for titles of this section mention DCHP or DHCPv6

versus splitting sentence with example in  middle.
This is just my style preference.

missing " quote for json configuration

(wlodek told me)

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.