Ethernet MAC addresses (macaddr type) are not compared correctly for

Ethernet MAC addresses (macaddr type) are not compared correctly for
equality.  The lobits macro is wrong and extracts the wrong set of
bits out of the structure.

To exhibit the problem:

select '000000:000000'::macaddr = '000000:110000'::macaddr ;
?column?
--------
t
(1 row)

Daniel Boyd