BUG/MINOR: acme: P-256 doesn't work with openssl >= 3.0

BUG/MINOR: acme: P-256 doesn't work with openssl >= 3.0

When trying to use the P-256 curve in the acme configuration with
OpenSSL 3.x, the generation of the account was failing because OpenSSL
doesn't return a NIST or SECG curve name, but a ANSI X9.62 one.

Since the ANSI X9.62 curve names were not in the list, it couldn't match
anything supported.

This patch fixes the issue by adding both prime192v1 and prime256v1 name
in the struct curve array which is used during curve parsing.

Must be backported to 3.2.