Add some hash functions

- new: md2, md4, md5, sha384, sha512, xxhash-32, xxhash-64
- put Blake2sp hash stuff back to rar code
- added the hashes to GUI and Explorer Menu code

CPP/Common/Md5Reg.cpp

@@ -0,0 +1,43 @@
+// Md5Reg.cpp /TR 2018-11-02
+
+#include "StdAfx.h"
+
+#include "../../C/CpuArch.h"
+
+EXTERN_C_BEGIN
+#include "../../C/hashes/md5.h"
+EXTERN_C_END
+
+#include "../Common/MyCom.h"
+#include "../7zip/Common/RegisterCodec.h"
+
+// MD5
+class CMD5Hasher:
+  public IHasher,
+  public CMyUnknownImp
+{
+  MD5_CTX _ctx;
+  Byte mtDummy[1 << 7];
+
+public:
+  CMD5Hasher() { MD5_Init(&_ctx); }
+
+  MY_UNKNOWN_IMP1(IHasher)
+  INTERFACE_IHasher(;)
+};
+
+STDMETHODIMP_(void) CMD5Hasher::Init() throw()
+{
+  MD5_Init(&_ctx);
+}
+
+STDMETHODIMP_(void) CMD5Hasher::Update(const void *data, UInt32 size) throw()
+{
+  MD5_Update(&_ctx, (const Byte *)data, size);
+}
+
+STDMETHODIMP_(void) CMD5Hasher::Final(Byte *digest) throw()
+{
+  MD5_Final(digest, &_ctx);
+}
+REGISTER_HASHER(CMD5Hasher, 0x207, "MD5", MD5_DIGEST_LENGTH)