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Optimization of boost:asio code is now disabled when building with
BOOST_ERROR_CODE_HEADER_ONLY under GCC versions 5.2.0 through 5.3.0.

src/lib/asiolink/asio_wrapper.h
    New file which wraps boost/asio/asio.hpp around compilation
    logic to suppress optimization under GNU 5.2.0 thru 5.3.0.

The remaining changes either removed the inclusion of <asio/asio.hpp> or
replaced it with the inclusion of <<asiolink/asio_wrapper.h>.  Inclusion
file order was also altered to better comply with our coding guidelines.

Split the logging into three loggers
 config & general
 dhcp to d2
 d2 to dns (and back)

Print out a request ID for each NCR event.  Currently this is the
DHCID but it could be changed in the future to allow for comparing
log entries between DHCP servers and D2.

Fix up some typos I ran across while reading the code

Actually modified a debug message to turn it into an info
message.

- Pass io_service to D2Process as a const reference
- Fix issues in memfile unittest

The messages in question are now output only with logging set to
DEBUG: the DHCP-DDNS process now outputs a minimum number of messages
by default.

Changed D2Process to get queue manager configuration values from D2Params.
This makes NCR protocol and format configurable.

Added a check in D2Process to detect when D2 is using an
address other than loopback on which to listen and issue
a log warning.
Added simple unit tests that permit visual log inspection
barring a simple, automated way to do it.

Some classes were using references to isc::asiolink::IOService, others
where using d2::IOServicePtr.  The latter is now used throughout for
consistency as well as support for future, possible, multi-threaded
implementation.

Replaced use of EXPECT_EQ(false,) with EXPECT_FALSE()
in d2_process_unittests.cc.  These were failing to
compile under Fedora 18/gtest 1.6. This appears to be
a gtest bug.  Other minor changes.

Minor corrections only, there were no major revisions.

Added main process event loop to D2Process which is the
primary application "object" in b10-dchp-ddns.

Along the way it was necessary to adjust D2QueueManager to treat
stopping as an asyncrhonous event when IO is pending. This
requied a change in lib-dchp-ddns to have awareness of when
IO is pending.

Fixed a bug in D2 configuration parsing in which parsing a
a subsequent configuration caused duplicate TSIGKeyInfo
entries.

When logger initialization was disabled for a unit test, a few NULL pointer
assertions came up. This was because, some module commands were executed
without arguments (NULL pointer objects). NULL pointers were not checked
before logging arguments. This led to assertions. NULL pointers are now
checked and "(no arg)" string is logged if present.

and corrected doxygen errors.

D2. It introduces DCfgMgrBase, abstract class for processing updates
to configuration, DCfgContext for storing configuration; and D2
specific initial derivations of each, D2CfgMgr and D2CfgContext.
These are skeletal derivations that will be expanded to handle
DHCP-DDNS specific configuration. New files added:

  src/bin/d2/d_cfg_mgr.h
  src/bin/d2/d_cfg_mgr.cc
  src/bin/d2/d2_cfg_mgr.h
  src/bin/d2/d2_cfg_mgr.cc
  src/bin/d2/tests/d_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.

to DProcessBase.

process class, D2Process, and the abstract class from which it derives,
DProcess. This class provides DHCP-DDNS specific event loop and business
logic.

The following new files have been added:

   src/bin/d2/d_process.h - defines the DProcess base class
   src/bin/d2/d2_process.h - defines the D2Process class
   src/bin/d2/d2_process.cc - implements the D2Process class
   src/bin/d2/tests/d2_process_unittests.cc - initial unit tests