[#3583] kea-dhcp4 now supports option class tagging

/src/bin/dhcp4/dhcp4_srv.cc
    Dhcpv4Srv::appendServerID() - modified to use the standard
    option defintion when appending a generated server id.

    Dhcpv4Srv::appendRequestedOptions()
    Dhcpv4Srv::appendRequestedVendorOptions()
    Dhcpv4Srv::appendBasicOptions()
    - modified to OptionDescriptor::allowedForClientClasses()

/src/bin/dhcp4/tests/classify_unittest.cc
    TEST_F(ClassifyTest, requestedOptionClassTagTest)
    TEST_F(ClassifyTest, vendorOptionClassTagTest)
    TEST_F(ClassifyTest, vivcoOptionClassTagTest)
    TEST_F(ClassifyTest, vivsoOptionClassTagTest)
    TEST_F(ClassifyTest, basicOptionClassTagTest)
    - new tests

/src/bin/dhcp4/tests/dhcp4_srv_unittest.cc
    TEST_F(Dhcpv4SrvTest, appendServerID) - updated test

/src/bin/dhcp4/tests/dhcp4_test_utils.*
    Dhcpv4SrvTest::checkServerIdentifier() - new function

/src/lib/dhcpsrv/cfg_option.*
    OptionDescriptor::allowedForClientClasses() - new function

/src/lib/dhcpsrv/tests/cfg_option_unittest.cc
    TEST(OptionDescriptorTest, allowedForClientClassesTest) - new test

[#3583] Added client-class to OptionDescriptor

option-data.client-classes can be parsed and
stored in OptionDescriptor.

/src/bin/dhcp4/dhcp4_lexer.ll
/src/bin/dhcp4/dhcp4_parser.yy

/src/bin/dhcp6/dhcp6_lexer.ll
/src/bin/dhcp6/dhcp6_parser.yy

/src/lib/dhcp/classify.*
    Added ClientClasses copy and equality operators

/src/lib/dhcp/tests/classify_unittest.cc
    Udpated unit tests

/src/lib/dhcpsrv/cfg_option.cc
    Added OptionDecription::client_classes_ and supporting funcs

/src/lib/dhcpsrv/parsers/option_data_parser.cc
    OptionDataParser::createOption() - modified to parse 'client-classes'

/src/lib/dhcpsrv/parsers/simple_parser4.cc
    Added 'client-classes' to OPTION4_PARAMETERS

/src/lib/dhcpsrv/parsers/simple_parser6.cc
    Added 'client-classes' to OPTION6_PARAMETERS

/src/lib/dhcpsrv/tests/cfg_option_unittest.cc
    Updated tests

/src/lib/dhcpsrv/tests/dhcp_parsers_unittest.cc
    TEST_F(ParseConfigTest, optionDataClientClasses4)
    TEST_F(ParseConfigTest, optionDataClientClasses6)
    TEST_F(ParseConfigTest, optionDataClientClassesEmpty4)
    TEST_F(ParseConfigTest, optionDataClientClassesEmpty6)
    - new tests

[#3552] Addressed comments

[#3552] Fixed rebase

[#3552] Updated ChangeLog entry

[#3552] Revamped configure code

[#3552] Added a ChangeLog entry

[#3552] Updated Botan support

[#3588] Improved no test logs

[#3588] Removed useless check

[#3588] Addressed comments

[#3588] Modified no test required classes

[#3585] Completed changelog

[#3585] Added config in changelog

[#3585] Added a ChangeLog entry

[#3585] Regen flex/bison

[#3585] Updated syntax

[#3586] fixed typos

[#3586] reverted table widthwq

[#3586] fixed loggers table

[#3586] addressed review comments

[#3586] updated documentation

[#3594] added ChangeLog entry

[#3594] updated ARM

[#3594] deprecate output_options

[#3594] accept output-options or output_options in log parser

[#3606] Disabled forceUDPSendFailure on macOS

[#3590] Finished required precedence update

[#3590] Checkpoint: updated unit tests

[#3590] Checkpoint: reversed required order

[#3536] added ChangeLog entry

[#3536] use only one loger on load and unload

[#3536] removed more duplicated messages

[#3536] add crypto ligs to mysql and pgsql

[#3536] fix check-messages

[#3536] fixed log level in mes files

[#3536] updated examples

[#3536] addressed review comments

[#3536] moved log messages and loggers

[#3536] merge mysql and pgsql hooks

[#3536] refactor getDBVersions

[#3536] removed empty line in getDBVersions

[#3536] addressed comments

[#3536] wrap long lines

[#3536] add namespace to .mes files

[#3536] remove Initializer

[#3536] implement getDBVersion

[#3536] enable unittests

[#3536] fixed unittests by disabling configs

[#3536] remove HAVE_MYSQL and HAVE_PGSQL

[#3536] added hook callouts

[#3565] Added ChangeLog for #3565

[#3565] Prevent declining expired and released

[#3578] addressed review comments

[#3578] added more UTs to config_parser_unittest

[#3578] addressed review comments

[#3578] reverted changes

[#3578] added ChangeLog entry

[#3578] added tests in get_config_unittests

[#3578] removed disabled tests

[#3578] added load write and reload test

[#3390] Rebased and addressed comments

[#3390] Added a ChangeLog entry

[#3390] Completed split UT

[#3390] Checkpoint: doc and split

[#3390] Checkpoint: code done

[#3604] Bump up version in configure.ac to 2.7.4

[#3599] release changes

[#3600] check if message file is empty

[#3597] bump up library versions for 2.7.3 release

[#3576] fix indentation

[#3576] Addressed review comments

Moved UT, cleaned up test JSON

[#3576] Updated ARM, added ChangeLog

modified:
    ChangeLog
    doc/sphinx/arm/classify.rst

[#3576] Swap order of template and subclass

/src/bin/dhcp4/tests/dhcp4_srv_unittest.cc
    TEST_F(Dhcpv4SrvTest, subClassPrecedence) - new test

/src/bin/dhcp6/tests/classify_unittests.cc
    TEST_F(ClassifyTest, subClassPrecedence) - new test

/src/lib/dhcp/pkt.cc
    Pkt::addSubClass() - changed to add subclass then template to packet

/src/lib/dhcp/tests/pkt4_unittest.cc
    TEST_F(Pkt4Test, templateClasses) - test now verifies class order

/src/lib/dhcp/tests/pkt6_unittest.cc
    TEST_F(Pkt6Test, templateClasses) - test now verifies class order

[#3506] Addressed comments

[#3506] Final improvements

[#3506] Fixed lock code

[#3506] Typo

[#3506] Close lock file descriptor

[#3506] Improved UNIX code

[#3506] Checkpoint: renamed get/set ControlSocketInfo

[#3506] Checkpoint: split UnixCommandMgr

[#3477] Typo

[#3477] Applied new patch

[#3477] Applied and completed patch

[#3477] Added missing shell tests

[#3477] Handled CA dir path

[#3477] Added DHCPv6 TLS UTs

[#3477] Checkpoint: finished DHCPv4 TLS UTs

[#3477] Checkpoint: began DHCPv4 TLS UTs

[#3477] Fixed longCommand UT

[#3477] Added TLS UT to d2

[#3477] Checkpoint: first UT updates

[#3477] Small fixes proposed by Razvan

[#3477] Checkpoint: last changes for d2

[#3477] Checkpoint: added d2 shell tests

[#3570] Fix line length in ChangeLog

[#3570] Removed obsolete notes from ARM

modified:   sphinx/arm/hooks-lease-query.rst

[#3536] addressed review comments

[#3536] updated Makefile.am files