Update copyrights for 2013

Fully update git head, and update back branches in ./COPYRIGHT and
legal.sgml files.

src/backend/storage/ipc/ipc.c

@@ -8,7 +8,7 @@
  * exit-time cleanup for either a postmaster or a backend.
  *
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/ipci.c

@@ -3,7 +3,7 @@
  * ipci.c
  *	  POSTGRES inter-process communication initialization code.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/pmsignal.c

@@ -4,7 +4,7 @@
  *	  routines for signaling the postmaster from its child processes
  *
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/storage/ipc/procarray.c

@@ -32,7 +32,7 @@
  * happen, it would tie up KnownAssignedXids indefinitely, so we protect
  * ourselves by pruning the array when a valid list of running XIDs arrives.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/procsignal.c

@@ -4,7 +4,7 @@
  *	  Routines for interprocess signalling
  *
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION

src/backend/storage/ipc/shmem.c

@@ -3,7 +3,7 @@
  * shmem.c
  *	  create shared memory and initialize shared memory data structures.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/shmqueue.c

@@ -3,7 +3,7 @@
  * shmqueue.c
  *	  shared memory linked lists
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/sinval.c

@@ -3,7 +3,7 @@
  * sinval.c
  *	  POSTGRES shared cache invalidation communication code.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/sinvaladt.c

@@ -3,7 +3,7 @@
  * sinvaladt.c
  *	  POSTGRES shared cache invalidation data manager.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  *

src/backend/storage/ipc/standby.c

@@ -7,7 +7,7 @@
  *	AccessExclusiveLocks and starting snapshots for Hot Standby mode.
  *	Plus conflict recovery processing.
  *
- * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION