on FUNC_MAX_ARGS by using an appropriate fmgr() call.

in indexkeys, classlist arrays.

Set default INDEX_MAX_KEYS to 16.  Document minimum safe value is 9.

and int2vector.

properly.

Improve cache invalidation handling. Eespecially
this would fix TODO
* elog() flushes cache, try invalidating just entries from
  current xact, perhaps using invalidation cache

errors.  VACUUM normally compacts the table back-to-front, and stops
as soon as it gets to a page that it has moved some tuples onto.
(This logic doesn't make for a complete packing of the table, but it
should be pretty close.)  But the way it was checking whether it had
got to a page with some moved-in tuples was to look at whether the
current page was the same as the last page of the list of pages that
have enough free space to be move-in targets.  And there was other
code that would remove pages from that list once they got full.
There was a kluge that prevented the last list entry from being
removed, but it didn't get the job done.  Fixed by keeping a separate
variable that contains the largest block number into which a tuple
has been moved.  There's no longer any need to protect the last element
of the fraged_pages list.
Also, fix NOTICE messages to describe elapsed user/system CPU time
correctly.

specified by regular-expression patterns.  Add some more files.

remove the no-longer-used files.