ChangeLog entry for SHA3 update, and link to current test vectors.

ChangeLog

+2015-08-24  Niels Möller  <nisse@lysator.liu.se>
+
+	* testsuite/sha3.awk: Document origin of test vectors.
+
+	From Nikos Mavrogiannopoulos.
+	* sha3.c (_sha3_pad): Update for NIST version.
+	* testsuite/sha3-224-test.c: Updated test vectors.
+	* testsuite/sha3-256-test.c: Likewise.
+	* testsuite/sha3-384-test.c: Likewise.
+	* testsuite/sha3-512-test.c: Likewise.
+
 2015-06-03  Niels Möller  <nisse@lysator.liu.se>
 
 	* arm/neon/chacha-core-internal.asm: New file. 55% speedup over C

testsuite/sha3.awk

 #! /usr/bin/awk -f
 
+# This script is used to process the Keccak testvectors, originally
+# we used http://keccak.noekeon.org/KeccakKAT-3.zip.
+# For the updated NIST version, test vectors can be found at
+# https://github.com/gvanas/KeccakCodePackage/tree/master/TestVectors
+
 /^Len/ { len = $3 }
 /^Msg/ { msg = $3 }
 /^MD/ { md = $3;