share/database/scripts/pgsql/dhcpdb_create.pgsql
share/database/scripts/pgsql/upgrade_012_to_013.sh.in
    Removed extraneous index

src/share/database/scripts/pgsql/dhcpdb_create.pgsql
src/share/database/scripts/pgsql/upgrade_012_to_013.sh.in
    Added host index for dhcp identifier + type only - v4 and v6
    Modified existing host index to include subnet-id = 0 - v4 and v6

doc/sphinx/arm/ctrl-channel.rst
    Added section "Control Agent Command Response Format"

src/hooks/dhcp/high_availability/query_filter.h
    Added commentary

src/hooks/dhcp/high_availability/tests/query_filter_unittest.cc
    Added commentary

doc/sphinx/arm/hooks.rst
    Added paragraph about hook library ordering

src/hooks/dhcp/high_availability/query_filter.cc
    Added comment

src/hooks/dhcp/high_availability/tests/query_filter_unittest.cc
    Test beyond enum EOF.

Added a ChangeLog

src/hooks/dhcp/high_availability/query_filter.*
    QueryFilter::isHaType(const dhcp::Pkt4Ptr& query4)
    QueryFilter::isHaType(const dhcp::Pkt6Ptr& query6)
    - new functions

    QueryFilter::inScope() - uses new functions to balance
    and scope messages of specific types

src/hooks/dhcp/high_availability/tests/query_filter_unittest.cc
    TEST_F(QueryFilterTest, loadBalancingHaTypes4)
    TEST_F(QueryFilterTest, loadBalancingHaTypes4MultiThreading)
    TEST_F(QueryFilterTest, loadBalancingHaTypes6)
    TEST_F(QueryFilterTest, loadBalancingHaTypes6MultiThreading)
    - new tests

src/lib/dhcp/dhcp6.h
    Uncommented v6 message types.

Removed the word FAILED/failed and toned down log messages added in #2352
so they will not be mistaken for error conditions.

src/lib/dhcpsrv/cfg_subnets4.cc
src/lib/dhcpsrv/cfg_subnets6.cc

src/lib/dhcpsrv/dhcpsrv_messages.cc b/src/lib/dhcpsrv/dhcpsrv_messages.cc
src/lib/dhcpsrv/dhcpsrv_messages.h b/src/lib/dhcpsrv/dhcpsrv_messages.h
src/lib/dhcpsrv/dhcpsrv_messages.h b/src/lib/dhcpsrv/dhcpsrv_messages.me