GitLab

 - added vendor options example and made it out-of-pool in
   kea6/reservations.json
 - fixed couple indents in dhcp{4,6}-srv.xml
 - added enclosing subnet4 where it was missing in examples
 - renamed section dedicated to option reservations
 - default value of host-reservation-identifiers presented
   differently

Change the connection timeout parameter from an "int" to an "unsigned
int". Update the checks to allow for lexical_cast not throwing an
exception when converting a string representing a negative number
to an unsigned int.

In addition, the default has been changed to five seconds.

    Fixed minor typos.

    Moved string/enum conversion functions inside D2ClientConfig

    Changed underscores to hypens in replace-client-name values and changed
    all literal values to lower case.

    Fixed minor wording issues in admin guide and new log messages.

    Added commentary and extra error logging to unit tests

    Added test case for invalid value of replace-client-name

    Revamped discussion of FQDN name generation and use of the
    replace-client-name parameter in the v4 and v6 guides.

also added a couple commas or missing spaces