Fix typo about SSL_CONF_FLAG_CMDLINE
Fix typo about SSL_CONF_FLAG_CMDLINE

change SSL_CONF_CMDLINE to SSL_CONF_FLAG_CMDLINE
CLA: trivial

Reviewed-by: Matt Caswell <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@openssl.org>
Reviewed-by: Shane Lontis <452ce16516ceed26291fe7de3f8b53540d83864e@oracle.com>
Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15489)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl