index: drop uid/gid from the index
index: drop uid/gid from the index

Since the ctime should track changes, and the uid and gid are stored in
the metadata now, drop the redundant values from the index.

Signed-off-by: Rob Browning <1dc5917c2adeeba13d1ef33dbb40691a1b67cc65@defaultvalue.org>
Tested-by: Rob Browning <1dc5917c2adeeba13d1ef33dbb40691a1b67cc65@defaultvalue.org>

pombredanne/bup,tjanez/bup,gevaerts/bup,ToxicFrog/bup,tjanez/bup,tjanez/bup,tjanez/bup,mhoeher/bup,tjanez/bup,mhoeher/bup,gevaerts/bup,ToxicFrog/bup,mhoeher/bup,gevaerts/bup,pombredanne/bup,pombredanne/bup,mhoeher/bup,ToxicFrog/bup,pombredanne/bup,ToxicFrog/bup,gevaerts/bup,mhoeher/bup,gevaerts/bup,mhoeher/bup,ToxicFrog/bup,pombredanne/bup,tjanez/bup,pombredanne/bup