dma: use OpenSSL 1.1 init API

> The SSL_library_init() and OpenSSL_add_ssl_algorithms() functions were
> deprecated in OpenSSL 1.1.0 by OPENSSL_init_ssl().

and

> The ERR_load_crypto_strings(), SSL_load_error_strings(), and
> ERR_free_strings() functions were deprecated in OpenSSL 1.1.0 by
> OPENSSL_init_crypto() and OPENSSL_init_ssl() and should not be used.

Reviewed by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D40065

dma: import snapshot 2021-07-10

Make dma(8) buildable.

Import Dragonfly Mail Agent into base system

It is a small and lightweight Mail Transport Agent.
It accepts mails from locally installed Mail User Agents (MUA) and delivers the
mails either locally or to a remote destination. Remote delivery includes
several features like TLS/SSL support, SMTP authentication and NULLCLIENT.

Make dma conditional to new WITHOUT_DMA option and make it respect WITHOUT_MAIL

Reviewed by: peter
Discussed with: emaste, bz, peter

crypto: Don't limit to TLSv1 only

Approved by: re (rgrimes, gjb)
Obtained from: upstream commit e94f50bbbe7318eec5b6b165ff73d94bbc9d20b0

Make dma(8) buildable.