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The former replaces the -v with the -d parameter in D2 unit tests. This
enables the D2 tests that were skipped when the -v parameter was in use.
The -v causes D2 to print version number and exits. The other patch is
for printing configuration summary in D2 which we were not aware was failing
because tests used to be skipped with -v parameter.

DController was extended to instantiate an IOSignalQueue and register for
signals with a SignalSet.  The default implementation for signal processing
supports SIGHUP as config file reload, and SIGINT/SIGTERM for graceful
shutdown.  D2Controller inherits this support without change.

A good deal of work went into the unit test classes as well, particularly
DControllerTest.

Static handlers were removed from DControllerBase.
Developer's guide has been updated to with --with-kea-config
discussion and updated diagrams.
Other minor corrections.

(Note ingore diffs in the diagram .svg files, they aren't particularly
meaningful to the human eye).

The configuration switch --with-kea-config, now selects between
two versions of D2Controller:

1. One which must run as a BUNDY module and is implemented in
bundy_d2_controller.(h/cc)

All of the BIND10 support was extracted from DControllerBase and moved
into this version of D2Controller.

This controller is tested in tests/bundy_d2_controller_unittests.cc

2. One that runs as a stand alone executable which must be supplied
with a configuration file via the command line and is implemented in
d2_controller.(h/cc).

This version of D2Controller is nearly identical the the original.
DControllerBase supports configuration from file.

This controller is tested in tests/d2_controller_unittests.cc

DControllerBase now inherits from Daemon which keeps it in step with
K4 and K6.

The stand-alone mode flag has been removed from all controllers.

On the FreeBSD10 system installed on the physical machine with the CPU:
(Intel(R) Core(TM) i7-2700K CPU @ 3.50GHz), Kea compiled with clang 3.3,
it takes slightly more than 2100ms (the previous timeout value) for the
callback to occur. This seems to be specific to this system but on the
other hand we don't test on FreeBSDs a lot, so the problem may be more
common than we think. This was okayed on Jabber.

collection of classes for housing and parsing the application configuration
necessary for the DHCP-DDNS application. This rounds out the D2CfgMgr initial
implementation.

New files:
   src/bin/d2/d2_config.cc
   src/bin/d2/d2_config.h
   src/bin/d2/tests/d2_cfg_mgr_unittests.cc

log messages. Log name is also now "dctl".

now b10-dhcp-ddns.

 class, D2Controller, the base class DControllerBase, and unit tests.

will be required to make d2 build.
Modified files:
    Makefile.am
    d2_log.cc
    d2_log.h
    d2_messages.mes
    d2.spec
    main.cc
    tests/Makefile.am
    tests/d2_test.py
New files:
    d2_controller.cc
    d2_controller.h
    d_controller.cc
    d_controller.h
    spec_config.h
    tests/d2_controller_unittests.cc
    tests/d_controller_unittests.cc
    tests/d_test_stubs.cc
    tests/d_test_stubs.h