On sluggish machines D2UpdateMgrTest.multiTransactionTimeout
failed intermittantly. A run-away test check was a bit too
stringent.

Adds support for DHCP-DDNS configuration parameters to b10-dhcp4.

Refactored some unit test classes in src/bin/d2/tests

Forgot to document params to doOneExchange.

Changed IP addresses used in tests in dhcp_parsers_unittest.cc
to comply test values recommened by RFCs.

Added missing test method commentary.

Conflicts:
	ChangeLog

Conflicts:
	src/lib/dhcp/iface_mgr.cc
	src/lib/dhcp/iface_mgr.h
	src/lib/dhcp/tests/iface_mgr_unittest.cc

Updated date in copyright header and reworded one message.

Many lines too long.
Use a tab before the keyword type.
Use two tabs before the committer username.

This was not reviewed. No content change.

I added spaces after commas also to be consistent
and to be a little more readable.
This was not reviewed as is minor.

Updated test fixture classes in src/bin/d2/tests/nc_add_unittests.cc and
nc_trans_unittests.cc to derive from TransactionTest.

  Integrates d2::NameAddTransaction and d2::NameRemoveTransaction into
  d2::D2UpdateMgr.

Added todo to dns_client.cc commentary regarding
trac# 3286 and the behavior isc::dns::Message::fromWire.

Added commentary to d2/tests/nc_test_utils.h::FauxServer
Corrected doxygen errors

Changed DNSClient ctor to require response param be
an empty pointer and clarified related commentary.
Added debug log statement to log transaction start.
Other minor cosmetics.

Conflicts:
	src/lib/dhcp/iface_mgr.cc