Always set security level to 0 for openssl versions >= 1.1.0

Always set security level to 0 for openssl versions >= 1.1.0

In version 1.1.0 of OpenSSL, a security level was introduced that enforces specific settings for certificates etc.
This PR sets the security level to 0, to retain the functionality that
previous versions of openssl had, and preventing errors like:

140088222534656:error:140AB18E:SSL routines:SSL_CTX_use_certificate:ca md too weak:../ssl/ssl_rsa.c:310

See https://www.openssl.org/docs/manmaster/man3/SSL_CTX_set_security_level.html for more information about security levels.

Signed-off-by: Elias Norberg <elias@aisle.se>
Signed-off-by: Daniel Lenski <dlenski@gmail.com>