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Conflicts:
	src/lib/dhcp/option_definition.cc
	src/lib/dhcp/option_definition.h

This commit also changes the ParserContext copy constructor and assignment
operator to handle copying of the NULL shared pointers.

Fix configure test for offset_ptr warnings.

Using select instead of poll/kqueue in message queue daemon.

This was no reviewed, but is consistent with previous ChangeLog entries.

These URLs may not be permanent, but have been working for over
a month and the previously documented URLs haven't worked for years.
This was not reviewed.

The joker in the pack here is io_address.h, required by the DHCP
header files.  That refers to the headers-only version of Boost
ASIO included in the BIND 10 source kit, so the ASIO files need
to be copied as well.

Conflicts:
	ChangeLog

Also, removed line wraps in toText function and added validation of the
flags field when calling unpack.