curl_ntlm_core: use wolfCrypt DES API with wolfSSL

[vszakats]

Replacing the last uses of the OpenSSL compatibility API, and dropping
the redefinition of external symbols.

[Copilot]

Pull request overview

Updates curl’s NTLM core DES support for the wolfSSL backend to use wolfCrypt’s DES API, removing the remaining reliance on wolfSSL’s OpenSSL-compatibility DES layer.

Changes:

• Switch curl_ntlm_core wolfSSL DES implementation to wolfCrypt (wc_Des_SetKey / wc_Des_EcbEncrypt).
• Update Autotools and CMake feature detection/macros from HAVE_WOLFSSL_DES_ECB_ENCRYPT to HAVE_WC_DES_ECBENCRYPT.
• Refresh CMake install documentation to reflect the new capability macro.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
m4/curl-wolfssl.m4	Autotools: detect wc_Des_EcbEncrypt and expose it for NTLM-core enablement.
lib/curl_setup.h	Gate USE_CURL_NTLM_CORE on HAVE_WC_DES_ECBENCRYPT for wolfSSL builds.
lib/curl_ntlm_core.c	Replace wolfSSL OpenSSL-compat DES usage with wolfCrypt DES primitives.
lib/curl_config-cmake.h.in	CMake config header template: replace old wolfSSL DES macro with new wolfCrypt one.
docs/INSTALL-CMAKE.md	Document the new HAVE_WC_DES_ECBENCRYPT CMake variable.
configure.ac	Autotools: enable NTLM core when HAVE_WC_DES_ECBENCRYPT is present.
CMakeLists.txt	CMake: detect wc_Des_EcbEncrypt and use it for NTLM-core enablement logic.

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