`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 #14495Closes#14514
Based on the standards and guidelines we use for our documentation.
- expand contractions (they're => they are etc)
- host name = > hostname
- file name => filename
- user name = username
- man page => manpage
- run-time => runtime
- set-up => setup
- back-end => backend
- a HTTP => an HTTP
- Two spaces after a period => one space after period
Closes#14073
- Fix sha256 and sha512 duplicate macro names (eg function-like macro Ch
is now Sha256_Ch and Sha512_Ch).
- Avoid defining short defines like R, S. (eg S is now Sha256_S).
Closes https://github.com/curl/curl/pull/13751
This is a follow-up for PR #12897.
Add support for SHA-512/256 digest calculation by TLS backends.
Currently only OpenSSL and GnuTLS (actually, nettle) support
SHA-512/256.
Closes#13070
