Add a link-layer type for Bluetooth Low Energy link-layer packets.
In WinPcap, provide a routine to get the Adapter pointer for a pcap_t.

That way, people don't have to dig into the pcap_t for it, and thus
expose themselves to having their code break if the Adapter pointer
moves, as it did recently.
Avoid some warnings from Sun C.

Some versions of Sun C support __attribute__ but don't support the
"unused" or "format" attributes - they don't fail, but they whine a lot.
Check whether they can be used without warnings, and use them only if
they can.
Merge git://github.com/the-tcpdump-group/libpcap

Merge in changes from the GitHub repository.
Some changes didn't make it into 1.4.0.

Fix the CHANGES list by moving some changes that got in after the 1.4.0
release was made into a list for 1.4.1, and add some additional fixes to
that list.