OpenSSL 3 deprecates SSL_CTX_load_verify_locations and the MD4, DES
functions we use.

Fix the MD4 and SSL_CTX_load_verify_locations warnings.

In configure, detect OpenSSL v3 and if so, inhibit the deprecation
warnings. OpenSSL v3 deprecates the DES functions we use for NTLM and
until we rewrite the code to use non-deprecated functions we better
ignore these warnings as they don't help us.

Closes #5139

Ref: https://docs.microsoft.com/windows/win32/api/wincrypt/nf-wincrypt-cryptacquirecontexta#parameters
Reviewed-by: Marc Hörsken
Closes https://github.com/curl/curl/pull/5088

We can use CC_MD4_Init/Update/Final without having to allocate memory
directly.

Closes #4979

Closes #4983

This keeps the interface the same as md5 and sha256.

* Don't include 'struct' in the gcrypt MD4_CTX typedef
* The call to gcry_md_read() should use a dereferenced ctx
* The call to gcry_md_close() should use a dereferenced ctx

Additional minor whitespace issue in the USE_WIN32_CRYPTO code.

Closes #4959

Follow-up to recent commits

[skip ci]

- Define USE_WIN32_CRYPTO by default. This enables SMB.

- Show whether SMB is enabled in the "Enabled features" output.

- Fix mingw compiler warning for call to CryptHashData by casting away
  const param. mingw CryptHashData prototype is wrong.

Closes https://github.com/curl/curl/pull/4717

Closes #3780