GitLab

 - GenericLeaseMgrTest class moved to a separate file
 - @todo added for disabled tests in memfile (with explanations)
 - Added several comments

Also, a couple of trivial changes, mostly documentary.

Got rid of nodistdir and used noinst_ instead of nodist_
for dhcp hooks tests

Also use -rpath /nowhere as a hack to trigger libtool to not create a
convenience archive, resulting in shared modules.

using reorder_message_file.py tool

 - Unit-tests for DHCPv4 now use configure() method.
 - Typo fixed in DHCPv6 unit-tests.
 - Removed, updated comments in cfgmgr
 - Guide updated

Altered D2ClientMgr::sendRequest to call the client's error handler if
in send mode and sendRequest fails. Prior to this it simply allowed any
sender exceptions to propagate.

Added ability to suspend DDNS updates to D2ClientMgr, so updating can be
stopped when errors communications with D2 fail.

Made D2ClientMgr non-copyable to avoid programmatic errors.

Changed D2ClientMgr to return simply return from startSender() if already
in send mode.

Added enableUpdates() method to D2ClientConfig to allow DDNS updates to be
enabled or disabled independent of reconfiguration.

D2ClientMgr now registers and unregisters its runReadyIO method and sender's
select-fd with IfaceMgr's external socket monitoring.

valgrind reported an invalid D2ClientMgr is destroyed while in send mode
Added call to stopSender to D2ClientMgr destructor.

d2_client.h and .cc was split into four files:

D2ClientConfig class is now in d2_client_cfg.h/cc
D2ClientMgr class is now in d2_client_mgr.h/cc

 - getRelayInfo() implemented, relay_ is now protected
 - setRelay => setRelayInfo
 - Option::Universe is passed as const reference
 - Further clarified white_list_ field in Subnet.h