[openssl/openssl] 801c63: Added Simple SSL Echo Client/Server to demos.

[matt]

  Branch: refs/heads/master
  Home:   https://github.openssl.org/openssl/openssl
  Commit: 801c638c50406c93d683c1ab8bd1d430cff4b6d0
      https://github.openssl.org/openssl/openssl/commit/801c638c50406c93d683c1ab8bd1d430cff4b6d0
  Author: bobwirka <bobwirka at yahoo.com>
  Date:   2022-04-12 (Tue, 12 Apr 2022)

  Changed paths:
    M demos/README.txt
    A demos/sslecho/A-SSL-Docs.txt
    A demos/sslecho/README.md
    A demos/sslecho/cert.pem
    A demos/sslecho/key.pem
    A demos/sslecho/main.c
    A demos/sslecho/makefile

  Log Message:
  -----------
  Added Simple SSL Echo Client/Server to demos.

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17260)