Closing some 8.4 open items

If there are no objections, I'm going to remove the following items
from the list at
http://wiki.postgresql.org/wiki/PostgreSQL_8.4_Open_Items

finishing posix_fadvise patch
Push to TODO

change cardinality() for multi-dim arrays?
Drop; there's no consensus that this should be changed

Change the empty-input case for string_to_array?
Drop; there's no consensus that this should be changed

change psql's \df output for window functions?
Drop; there's no consensus that this should be changed

Polymorphic types vs. domains
Push to TODO

        regards, tom lane