Fix comments in SCRAM-SHA-256 patch.

Amit Kapila.

src/backend/libpq/auth-scram.c

@@ -37,7 +37,7 @@
  * to the encoding being used, whatever that is.  We cannot avoid that in
  * general, after logging in, but let's do what we can here.
  *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * src/backend/libpq/auth-scram.c

src/common/base64.c

@@ -3,7 +3,7 @@
  * base64.c
  *	  Encoding and decoding routines for base64 without whitespace.
  *
- * Copyright (c) 2001-2016, PostgreSQL Global Development Group
+ * Copyright (c) 2001-2017, PostgreSQL Global Development Group
  *
  *
  * IDENTIFICATION

src/common/scram-common.c

@@ -6,7 +6,7 @@
  * backend, for implement the Salted Challenge Response Authentication
  * Mechanism (SCRAM), per IETF's RFC 5802.
  *
- * Portions Copyright (c) 2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 2017, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
  *	  src/common/scram-common.c

src/include/common/base64.h

@@ -3,7 +3,7 @@
  *	  Encoding and decoding routines for base64 without whitespace
  *	  support.
  *
- * Portions Copyright (c) 2001-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 2001-2017, PostgreSQL Global Development Group
  *
  * src/include/common/base64.h
  */

src/include/common/scram-common.h

@@ -3,10 +3,10 @@
  * scram-common.h
  *		Declarations for helper functions used for SCRAM authentication
  *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * src/include/common/relpath.h
+ * src/include/common/scram-common.h
  *
  *-------------------------------------------------------------------------
  */

src/include/libpq/scram.h

@@ -3,7 +3,7 @@
  * scram.h
  *	  Interface to libpq/scram.c
  *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * src/include/libpq/scram.h

src/interfaces/libpq/fe-auth-scram.c

@@ -3,7 +3,7 @@
  * fe-auth-scram.c
  *	   The front-end (client) implementation of SCRAM authentication.
  *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION