Looks like we have mergeinfo property on a bunch of files under sys/boot in head
and stable/9.
At least the following are affected:
sys/boot/powerpc/boot1.chrp
sys/boot/powerpc/ofw
sys/boot/i386/efi
...
Not sure if that mergeinfo is useful for anything.
It seems that it was added to head in r218822 ("Merge binutils 2.17.50 to head").
--
Andriy Gapon