New code for locking buffer' context.

no longer returns buffer pointer, can be gotten from scan;
	descriptor; bootstrap can create multi-key indexes;
pg_procname index now is multi-key index; oidint2, oidint4, oidname
are gone (must be removed from regression tests); use System Cache
rather than sequential scan in many places; heap_modifytuple no
longer takes buffer parameter; remove unused buffer parameter in
a few other functions; oid8 is not index-able; remove some use of
single-character variable names; cleanup Buffer variables usage
and scan descriptor looping; cleaned up allocation and freeing of
tuples; 18k lines of diff;

Another PGINDENT run that changes variable indenting and case label indenting.  Also static variable indenting.

2. Re-initialize keys in gistrescan (if gist used in inner scan).

Makefile fixed for fmgr.h

Mainly...fix up the includes I removed, as well as prototypes

Pointed out by D'Arcy

files

postgres.h already pulled in (postgres.h includes c.h)

the commit :(

Here's the rest of the GiST code thta was missing...

 Postgres is not able to cluster a relation on which an rtree index is
 defined. Postmaster gives the following error message:

 Too Large Allocation Request("!(0 < (size) && (size) <= (0xfffffff)):size=0
 [0x0]", File:"/export/home/postgres/src/backend/utils/mmgr/mcxt.c", Line: 220)
  !(0 <(size) && (size) <= (0xfffffff)) (0) [No such file or directory]

Submitted by: Dirk Koeser <koeser@informatik.uni-rostock.de>