CURL_ARRAYSIZE()
Follow-up to 13b2ea68f0 #16111 Closes #16381
13b2ea68f0
`SHA512_256_BLOCK_SIZE`, `SHA512_256_DIGEST_SIZE` macros were both defined within curl and also in the nettle library required by GnuTLS. Fix it by namespacing the curl macros. Cherry-picked from #14495 Closes #14514