now b10-dhcp-ddns.

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

needs 2955 (which is now complete) to finish.

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

 to bin/src/D2.

typo before

to DProcessBase.

Sending notifications over msgq.

No receiving end yet.

this should fix test failures reported by buildbots.  confirmed, committing
at my discretion.

there seems to be a portability issue without it.

This disables the test to receive data over a closed socket on BSD systems.
The 8.1-RELEASE version of FreeBSD has a bug which causes select() not to
return EBADF error code when invalid socket descriptor is provided. The
bug number is kern/155606.

The socket function returns socket descriptor on success and value of -1
on error. This implies that 0 is a valid socket descriptor and the unit
test which verifies it should treat 0 as success. Previous version of
IfaceMgr unit test expected positive result.

Conflicts:
	src/lib/dhcp/Makefile.am

So it is the same as in the ipc-high.txt.

it's described in the context of findZone() method.

added a note on the numbering.
and made one piggyback cleanup: define public static const explicitly.

The ETHERTYPE_IP is defined in different header files on different OSes.
Since it is just a single constant that is needed, it is not practical
to locate the proper header file in configure.ac to pull single constant.