Issue #16113: Add SHA-3 and SHAKE support to hashlib module.
diff --git a/Modules/_sha3/README.txt b/Modules/_sha3/README.txt
new file mode 100644
index 0000000..e34b1d1
--- /dev/null
+++ b/Modules/_sha3/README.txt
@@ -0,0 +1,11 @@
+Keccak Code Package
+===================
+
+The files in kcp are taken from the Keccak Code Package. They have been
+slightly to be C89 compatible. The architecture specific header file
+KeccakP-1600-SnP.h ha been renamed to KeccakP-1600-SnP-opt32.h or
+KeccakP-1600-SnP-opt64.h.
+
+The 64bit files were generated with generic64lc/libkeccak.a.pack target, the
+32bit files with generic32lc/libkeccak.a.pack.
+