src/lib/dhcpsrv/parsers/client_class_def_parser.cc
    ClientClassDefListParser::commit() - pushes the newly built local
    dictionary to CfgMgr staging

src/lib/dhcpsrv/srv_config.h
src/lib/dhcpsrv/srv_config.cc
    Added client class dictionary member to SrvConfig

src/lib/dhcpsrv/tests/client_class_def_parser_unittest.cc
    TEST_F(ClientClassDefListParserTest, simpleValidList) - now
    verifies that ClientClassDefListParser::commit() pushes its
    local dictionary to CfgMgr staging.

src/lib/dhcpsrv/tests/srv_config_unittest.cc
    Added support to test new client class dictionary member

In anticipation adding client class storage to SrvConfig:

src/lib/dhcpsrv/client_class_def.h
src/lib/dhcpsrv/client_class_def.cc
    added copy contructor, equals() method, ==, != operators
    To ClientClassDef and ClientClassDictionary

src/lib/dhcpsrv/tests/client_class_def_unittest.cc
    Added copyAndEquality tests for ClientClassDef and
    ClientClassDictionary

New Files:
    parsers/client_class_def_parser.cc
    parsers/client_class_def_parser.h
    tests/client_class_def_parser_unittest.cc

src/lib/dhcpsrv/parsers/Makefile.am
    Added entries for new files
    Added EXTRA_DIST entries for several files that were missing.

src/lib/dhcpsrv/parsers/dhcp_parsers.h
    Added typedef for OptionDataListParserPtr

src/lib/dhcpsrv/tests/Makefile.am
    Added entries for new unitest file

src/lib/dhcpsrv/tests/client_class_def_unittest.cc
    Fixed broken unit test TEST(ClientClassDef, cfgOptionBasics)

The initial choice for storing options as an OptionCollection
in the ClientClassDef was incorrect.  They are now stored within
a CfgOption which is symmetrical with how they are stored globally
and in subnets.

    Merged in #4095.

Merged in change made to GitHub for ticket trac4111.

src/lib/dhcpsrv/client_class_def.cc
src/lib/dhcpsrv/client_class_def.h
src/lib/dhcpsrv/tests/client_class_def_unittest.cc
    New files that define client class storage classes and tests

src/lib/dhcp/classify.h
    Amended commentary to reflect how these classes are now being used.

src/lib/dhcp/option.h
    Added typedefs:
        boost::shared_ptr<Option> OptionPtr;
        boost::shared_ptr<OptionCollection> OptionCollectionPtr;

src/lib/dhcpsrv/Makefile.am
    Added entries for new files

src/lib/dhcpsrv/tests/Makefile.am
    Added entries for new file

src/lib/eval/token.h b/src/lib/eval/token.h
    Added typedef:
        boost::shared_ptr<Expression> ExpressionPtr;

Remove change log entry as it isn't needed

Update eval log description in user guide.

Update per the review comments except for the logging
stuff which will be done next.

This fixes issues reported by the coverity scans recently.