[#42, !103] Addressed two review comments.

Commentary for sleep(1) in case of the error condition in the IfaceMgr.
Also fixed one parameter name in the doxygen.

[#42, !103] Additional review fixes

    Minor commentary changes.

[#42,!103] Addressed majority of review comments

    Most notable change is "queue-control" is now "dhcp-queue-control"

[#42, !103] General clean up

[#42] kea-dhcp4 parsing simplified

kea-dhcp4 parsing now matches kea-dhpc6 in parsing queue-control
as simply a map that must contain "queue-type".

[#42] kea-dhcp6 can now parse and use queue-control

src/bin/dhcp6/ctrl_dhcp6_srv.cc
    ControlledDhcpv6Srv::processConfig() - adde packet queue config logic

src/bin/dhcp6/dhcp6_lexer.ll
    Added parsing of queue-control

src/bin/dhcp6/dhcp6_messages.mes
    Added DHCP6_CONFIG_PACKET_QUEUE message

src/bin/dhcp6/dhcp6_parser.yy

src/bin/dhcp6/json_config_parser.cc
    configureDhcp6Server() - now parses "queue-control"

src/bin/dhcp6/parser_context.*
    Added QUEUE_CONTROL

src/bin/dhcp6/tests/config_parser_unittest.cc
    TEST_F(Dhcp6ParserTest, queueControl)
    TEST_F(Dhcp6ParserTest, queueControlInvalid) - new tests

src/lib/dhcpsrv/parsers/queue_control_parser.*
    Revamped to construct an ElementPtr rather than QueueControl

[#42] Replaced use of QueueControl with ElementPtr

deleted:
    src/lib/dhcp/queue_control.cc
src/lib/dhcp/queue_control.h
src/lib/dhcp/tests/queue_control_unittest.cc

Updates is mulitple files

[#42] Implemented PacketQueueMgr class

New files:
    src/lib/dhcp/packet_queue_mgr.h
    src/lib/dhcp/packet_queue_mgr4.cc
    src/lib/dhcp/packet_queue_mgr4.h
    src/lib/dhcp/packet_queue_mgr6.cc
    src/lib/dhcp/packet_queue_mgr6.h
    src/lib/dhcp/tests/packet_queue_mgr4_unittest.cc
    src/lib/dhcp/tests/packet_queue_mgr6_unittest.cc
    src/lib/dhcp/tests/packet_queue_testutils.h

src/bin/dhcp4/ctrl_dhcp4_srv.cc
    Cleaned up packet queue config block

src/bin/dhcp4/dhcp4_lexer.ll
src/bin/dhcp4/dhcp4_parser.yy
src/bin/dhcp4/tests/config_parser_unittest.cc
    added queue-type

src/bin/dhcp4/dhcp4_messages.mes
    added DHCP4_CONFIG_PACKET_QUEUE message

src/lib/dhcp/Makefile.am
    packet_queue_mgr.h
    packet_queue_mgr4.cc packet_queue_mgr4.h
    packet_queue_mgr6.cc packet_queue_mgr6.h

src/lib/dhcp/iface_mgr.*
    Replaced packet queue members with PQM members
    Added PQM instantion to IfaceMgr ctor

src/lib/dhcp/packet_queue.h
    added getInfo,getInfoStr

src/lib/dhcp/tests/Makefile.am
    packet_queue_mgr4_unittest.cc
    packet_queue_mgr6_unittest.cc

src/lib/dhcpsrv/parsers/queue_control_parser.cc
    added queue-type

[#42, !103] Interrim commit, kea-dhcp4 supports "queue-control"

    kea-dhcp4 will parse and use "queue-control" to configure ring
    buffer size:

    "Dhcp4":
    {
        "queue-control": {
            # max number of packets the ring will hold
            "capacity" : 100
        },
    :

    This is an interrim commit for testing purposes.
    Expect a fair amount of refactoring in subsequent commits.

New files:
src/lib/dhcp/queue_control.cc
src/lib/dhcp/queue_control.h
src/lib/dhcp/tests/queue_control_unittest.cc
src/lib/dhcpsrv/parsers/queue_control_parser.cc
src/lib/dhcpsrv/parsers/queue_control_parser.h

src/bin/dhcp4/ctrl_dhcp4_srv.cc
    ControlledDhcpv4Srv::processConfig() -
        added logic to set packet queue controller

src/bin/dhcp4/dhcp4_lexer.ll b/src/bin/dhcp4/dhcp4_lexer.ll
src/bin/dhcp4/dhcp4_parser.yy
src/bin/dhcp4/parser_context.*
    Added queue-control parsing

src/bin/dhcp4/json_config_parser.cc
    configureDhcp4Server() - recognize and parse "queue-control"

src/bin/dhcp4/tests/config_parser_unittest.cc
    TEST_F(Dhcp4ParserTest, queueControl)
    TEST_F(Dhcp4ParserTest, queueControlInvalid)
    - new tests

src/lib/dhcp/iface_mgr.*
    IfaceMgr::getPacketQueueControl4()
    IfaceMgr::setPacketQueueControl4()
    IfaceMgr::getPacketQueueControl6()
    IfaceMgr::setPacketQueueControl6()

src/lib/dhcp/packet_queue.*
    Use QueueControl class

src/lib/dhcpsrv/srv_config.*
    Added QueueControl member, getter/setter
    SrvConfig::toElement() - now emits queue-control if not null

[#42,!103] Initial receiver thread and packet queuing

New files:
    src/lib/dhcp -
    packet_queue.h - defines packet queuing template classes
    socket_info.h - contains existing class extracted iface_mgr.h
    tests/packet_queue4_unittest.cc
    tests/packet_queue6_unittest.cc

src/lib/dhcp/iface_mgr.*
IfaceMgr:: - new functions
    - receiveDHCP<4/6>Packets() - thread worker function which
    monitors interface sockets, enqueues packets as they are read

    - receiveDHCP<4/6>Packet() - reads a single packet from a socket

    - startDHCPReceiver(const uint16_t family) - runs
    receiveDHCP<4/6?appropriate worker function in a thread

    - stopReceiver() - stops the receiver thread

    - setPacketQueue<4/6> - replaces the default packet queue instance

    receiveDHCP<4/6>() - modified to monitor receiver watch
    socekts rather than interface sockets.  Dequeue packets
    from packet queue.

src/lib/dhcp/tests/iface_mgr_unittest.cc
    TEST_F(IfaceMgrTest, packetQueue4)
    TEST_F(IfaceMgrTest, packetQueue6)

src/lib/dhcpsrv/cfg_iface.cc
    CfgIface::openSockets() - starts DHCP receiver
    CfgIface::closeSockets() - stops DHCP receiver

[148-lib-process-without-args] Repaired system tests

[#148,!80] When run without arguments netconf,d2,ca prints out usage.

[148-lib-process-servers-without-arguments] Added system test

# Conflicts:
# src/bin/netconf/tests/netconf_tests.sh.in

[148-lib-process-servers-without-arguments] Added unit tests

[148-lib-process-servers-without-arguments] Bug fixed - need tests

[148-lib-process-servers-without-arguments] trailing spaces

[148-lib-process-servers-without-arguments] trailing spaces

[65-libyang-gcc-requirement] Wrapped long lines

[#65,!64] Reworked installation notes

 - mostly moved to wiki, also cleaned up some text

[65-libyang-gcc-requirement] typo

[65-libyang-gcc-requirement] Updated

[master] spelling

[#65,!62] Changes after review.

[65-libyang-adaptors] Addressed comments

[#65,!62] Added extra explanation how to start sysrepod

 - Wlodek was complaining that it was confusing

[#65,!62] Small clarifications after review.

[65-libyang-adaptors] Added high level adaptors from lib-yang

[65-libyang-logger_rebased] Rebased before merging

[master] unused parameter

[master] kea-dhcp4 server now opens configuration backends

    Merge branch '101-cb-add-two-step-configuration-to-the-dhcpv4-server-2'

[master] Added ChangeLog entry for issue #93.

[#93,!63] Added @todo in the ServerSelector header file.

[#93,!63] Added todo to the MySQL query macros.

[#93,!63] Added todo to expand unit test to cover per server config.

[#93,!63] Fixed MySQL macro name.

[#93,!63] Throw exception if the server selector is unassigned.

[#93,!63] Implemented getHost() and getPort() MySQL backend functions.

[#93,!63] Use getServerTag() convenience function.

[#93,!63] Fixed update statement for option definition.

[#93,!63] Server selection is partially supported for options.

Also, MySQL prepared statements are moved to a common header.

[#93,!63] Server selection is partially supported for option definitions.

[#93,!63] Server selection is partially supported for shared networks.

[#93,!63] Resolve conflicts after rebase.

[#93,!63] Server selection partially working for subnets.

[#93,!63] Server selection partially working for global paramneters.

[#93,!63] Removed extraneous constants introduced during rebase.

[#93,!63] Implemented server selection for global parameters in MySQL.

[#93,!63] Added CASCADE delete to MySQL CB schema.

[#93,!63] Added logical servers to dhcp4_server and dhcp6_server MySQL.

[#93,!56] Addressed review comments.

[#65,!29] Minor clarifications

[5-netconf-extend-syntax_rebased] Addressed rebase conflicts

[#101,!73] Addressed missed review items

[5-netconf-extend-syntax] Updated get_config.json

[5-netconf-extend-syntax] Addressed comments

[#101, !73] Addresses review comments

[65-libyang-logger_rebased] Addressed rebase conflicts

[65-libyang-pd-pool_rebased] Addressed rebase conflicts

[65-libyang-pd-pool] [non-]empty applies to lists

[65-libyang-pd-pool] Uniformized throw message

[#65,!45] Added missing unit-test.

[65-libyang-host_rebased] Rebased before merging

[#65,!46] Minor clarifications in comments.

[#65,!46] Missing unit-test added.

[5-netconf-doc-config] Final changes

[#5,!53] Updated netconf docs

[5-netconf-doc-config] Removed to resolved comments

[5-netconf-doc-config] typo (comment)

[5-netconf-doc-config] Updated netconf doc

[#5,!53] Updated user's guide after review.

[5-netconf-doc-config] More about module change subscriptions

[5-netconf-doc-config] Updated manual page

[5-netconf-doc-config] Filled netconf agent doc

[#101,!73] kea-dhcp4 can init CB backends based on config

src/bin/dhcp4/json_config_parser.*
    databaseConfigConnect(const SrvConfigPtr& srv_cfg)
    databaseConfigFetch(const SrvConfigPtr& srv_cfg, ElementPtr /*global_scope*/)
    - new functions

    configureDhcp4Server() - modified to call databaseConfigFetch() after
    loading hook libs

src/bin/dhcp4/tests/config_parser_unittest.cc
    TEST_F(Dhcp4ParserTest, configControlInfoNoFactory) - new test
    TEST_F(Dhcp4ParserTest, configControlInfo) - modified to register
    dummy backend

src/lib/dhcpsrv/testutils/test_config_backend_dhcp4.*
    New files that implement DHPC4 dummy backend for testing

[5-netconf-extend-syntax] Updated shell tests

[5-netconf-extend-syntax] Merge branch '5-netconf-extend-syntax' of gitlab.isc.org:isc-projects/kea into 5-netconf-extend-syntax

[5-netconf-extend-syntax] Extended syntax

[master] [master] Update git hash

[153-netconf-control-socket] Addressed review comments

[#153, !60] Minor changes after review.

[153-netconf-control-socket] Fixes from Ubuntu

[153-netconf-control-socket] Added control socket code from kea-yang

[153-netconf-control-socket] Extended command

[65-libyang-host_rebased] Addressed rebase conflicts

[65-libyang-logger_rebased] Addressed rebase conflicts

[65-libyang-pd-pool_rebased] Rebased after database translator merge

[#65,!28] Minor comment changes after review.

[65-libyang-logger_rebased] Addressed rebase conflicts

[65-libyang-database_rebased] Addressed rebase conflicts

[65-libyang-host_rebased] Addressed rebase conflicts

[65-libyang-pd-pool_rebased] Rebased after control socket merge

[65-libyang-control-socket_rebase] Rebasing before merge

[65-libyang-control-socket] Note that kea-dhcp-ddns server not yet support it

[master] Added ConfigBackendDHCPv4Mgr

    Merge branch '101-cb-add-two-step-configuration-to-the-dhcpv4-server'

[#65, !27] Minor comments connection.

[#101,!58] Rebased for merge

modified:   AUTHORS
    modified:   doc/guide/netconf.xml
modified:   src/bin/netconf/netconf_controller.cc
modified:   src/bin/netconf/netconf_controller.h
modified:   src/lib/process/Makefile.am
deleted:    src/share/database/scripts/mysql/dhcpdb_create.mysql.orig
deleted:    src/share/database/scripts/mysql/upgrade_6.0_to_7.0.sh.in.orig

[147-pid-files-dir-error] dhcp_data_dir added to Makefile.am

[#101,!53] Addressed review comments

[#101,!58] Implemented ConfigBackendDhcp4Mgr, mysql backend registers/unregisters

src/hooks/dhcp/mysql_cb/mysql_cb_callouts.cc
    load() - added call to register MySQL backend
    unload() - added call to unregister MySQL backend

src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.*
    MySqlConfigBackendDHCPv4::registerBackendType()
    MySqlConfigBackendDHCPv4::unregisterBackendType()
    - new static methods for registering/unregistering

src/hooks/dhcp/mysql_cb/tests/Makefile.am
    mysql_cb_dhcp4_mgr_unittest.cc  - new file

src/lib/config_backend/base_config_backend_mgr.h
    bool unregisterBackendFactory(const std::string& db_type)
    - new method to unregister factory and delete backends

src/lib/config_backend/base_config_backend_pool.h
    void delAllBackends(const std::string& db_type)
    - new method to delete all backends of a given type

/src/lib/config_backend/tests/config_backend_mgr_unittest.cc
    TEST_F(ConfigBackendMgrTest, unregister) - new test

src/lib/dhcpsrv/Makefile.am
src/lib/dhcpsrv/config_backend_dhcp4.h
src/lib/dhcpsrv/config_backend_dhcp4.cc
    New files that implement ConfigBackendDhcp4Mgr

src/lib/dhcpsrv/config_backend_pool_dhcp4.h
    Added missing public scope, removed pure virtual function

src/lib/eval/tests/Makefile.am
    Added new dependency libkea-cc

[#101,!58] Addressed review comments