Restructure some header files a bit, in particular heapam.h, by removing some

unnecessary #include lines in it.  Also, move some tuple routine prototypes and
macros to htup.h, which allows removal of heapam.h inclusion from some .c
files.

For this to work, a new header file access/sysattr.h needed to be created,
initially containing attribute numbers of system columns, for pg_dump usage.

While at it, make contrib ltree, intarray and hstore header files more
consistent with our header style.

src/backend/access/gist/gist.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.149 2008/01/01 19:45:46 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.150 2008/05/12 00:00:44 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,6 +18,7 @@
 #include "access/gist_private.h"
 #include "catalog/index.h"
 #include "miscadmin.h"
+#include "storage/bufmgr.h"
 #include "utils/memutils.h"
 
 const XLogRecPtr XLogRecPtrForTemp = {1, 1};

src/backend/access/gist/gistget.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gistget.c,v 1.72 2008/04/14 17:05:33 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gistget.c,v 1.73 2008/05/12 00:00:44 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,6 +18,7 @@
 #include "executor/execdebug.h"
 #include "miscadmin.h"
 #include "pgstat.h"
+#include "storage/bufmgr.h"
 #include "utils/memutils.h"
 
 

src/backend/access/gist/gistscan.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gistscan.c,v 1.68 2008/01/01 19:45:46 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gistscan.c,v 1.69 2008/05/12 00:00:44 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,6 +17,7 @@
 #include "access/genam.h"
 #include "access/gist_private.h"
 #include "access/gistscan.h"
+#include "storage/bufmgr.h"
 #include "utils/memutils.h"
 
 static void gistfreestack(GISTSearchStack *s);

src/backend/access/gist/gistutil.c

@@ -8,15 +8,16 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *			$PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.25 2008/01/01 19:45:46 momjian Exp $
+ *			$PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.26 2008/05/12 00:00:44 alvherre Exp $
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
 
 #include "access/gist_private.h"
-#include "access/heapam.h"
 #include "access/reloptions.h"
 #include "storage/freespace.h"
+#include "storage/lmgr.h"
+#include "storage/bufmgr.h"
 
 /*
  * static *S used for temrorary storage (saves stack and palloc() call)

src/backend/access/gist/gistvacuum.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.34 2008/01/01 19:45:46 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.35 2008/05/12 00:00:44 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -16,10 +16,11 @@
 
 #include "access/genam.h"
 #include "access/gist_private.h"
-#include "access/heapam.h"
 #include "commands/vacuum.h"
 #include "miscadmin.h"
+#include "storage/bufmgr.h"
 #include "storage/freespace.h"
+#include "storage/lmgr.h"
 #include "utils/memutils.h"
 
 

src/backend/access/gist/gistxlog.c

@@ -8,14 +8,15 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *			 $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.27 2008/01/01 19:45:46 momjian Exp $
+ *			 $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.28 2008/05/12 00:00:44 alvherre Exp $
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
 
 #include "access/gist_private.h"
-#include "access/heapam.h"
+#include "access/xlogutils.h"
 #include "miscadmin.h"
+#include "storage/bufmgr.h"
 #include "utils/memutils.h"